community[major], core[patch], langchain[patch], experimental[patch]: Create langchain-community (#14463)

Moved the following modules to new package langchain-community in a backwards compatible fashion:

```
mv langchain/langchain/adapters community/langchain_community
mv langchain/langchain/callbacks community/langchain_community/callbacks
mv langchain/langchain/chat_loaders community/langchain_community
mv langchain/langchain/chat_models community/langchain_community
mv langchain/langchain/document_loaders community/langchain_community
mv langchain/langchain/docstore community/langchain_community
mv langchain/langchain/document_transformers community/langchain_community
mv langchain/langchain/embeddings community/langchain_community
mv langchain/langchain/graphs community/langchain_community
mv langchain/langchain/llms community/langchain_community
mv langchain/langchain/memory/chat_message_histories community/langchain_community
mv langchain/langchain/retrievers community/langchain_community
mv langchain/langchain/storage community/langchain_community
mv langchain/langchain/tools community/langchain_community
mv langchain/langchain/utilities community/langchain_community
mv langchain/langchain/vectorstores community/langchain_community
mv langchain/langchain/agents/agent_toolkits community/langchain_community
mv langchain/langchain/cache.py community/langchain_community
mv langchain/langchain/adapters community/langchain_community
mv langchain/langchain/callbacks community/langchain_community/callbacks
mv langchain/langchain/chat_loaders community/langchain_community
mv langchain/langchain/chat_models community/langchain_community
mv langchain/langchain/document_loaders community/langchain_community
mv langchain/langchain/docstore community/langchain_community
mv langchain/langchain/document_transformers community/langchain_community
mv langchain/langchain/embeddings community/langchain_community
mv langchain/langchain/graphs community/langchain_community
mv langchain/langchain/llms community/langchain_community
mv langchain/langchain/memory/chat_message_histories community/langchain_community
mv langchain/langchain/retrievers community/langchain_community
mv langchain/langchain/storage community/langchain_community
mv langchain/langchain/tools community/langchain_community
mv langchain/langchain/utilities community/langchain_community
mv langchain/langchain/vectorstores community/langchain_community
mv langchain/langchain/agents/agent_toolkits community/langchain_community
mv langchain/langchain/cache.py community/langchain_community
```

Moved the following to core
```
mv langchain/langchain/utils/json_schema.py core/langchain_core/utils
mv langchain/langchain/utils/html.py core/langchain_core/utils
mv langchain/langchain/utils/strings.py core/langchain_core/utils
cat langchain/langchain/utils/env.py >> core/langchain_core/utils/env.py
rm langchain/langchain/utils/env.py
```

See .scripts/community_split/script_integrations.sh for all changes

libs/community/langchain_community/indexes/base.py

@@ -0,0 +1,172 @@
+from __future__ import annotations
+
+import uuid
+from abc import ABC, abstractmethod
+from typing import List, Optional, Sequence
+
+NAMESPACE_UUID = uuid.UUID(int=1984)
+
+
+class RecordManager(ABC):
+    """An abstract base class representing the interface for a record manager."""
+
+    def __init__(
+        self,
+        namespace: str,
+    ) -> None:
+        """Initialize the record manager.
+
+        Args:
+            namespace (str): The namespace for the record manager.
+        """
+        self.namespace = namespace
+
+    @abstractmethod
+    def create_schema(self) -> None:
+        """Create the database schema for the record manager."""
+
+    @abstractmethod
+    async def acreate_schema(self) -> None:
+        """Create the database schema for the record manager."""
+
+    @abstractmethod
+    def get_time(self) -> float:
+        """Get the current server time as a high resolution timestamp!
+
+        It's important to get this from the server to ensure a monotonic clock,
+        otherwise there may be data loss when cleaning up old documents!
+
+        Returns:
+            The current server time as a float timestamp.
+        """
+
+    @abstractmethod
+    async def aget_time(self) -> float:
+        """Get the current server time as a high resolution timestamp!
+
+        It's important to get this from the server to ensure a monotonic clock,
+        otherwise there may be data loss when cleaning up old documents!
+
+        Returns:
+            The current server time as a float timestamp.
+        """
+
+    @abstractmethod
+    def update(
+        self,
+        keys: Sequence[str],
+        *,
+        group_ids: Optional[Sequence[Optional[str]]] = None,
+        time_at_least: Optional[float] = None,
+    ) -> None:
+        """Upsert records into the database.
+
+        Args:
+            keys: A list of record keys to upsert.
+            group_ids: A list of group IDs corresponding to the keys.
+            time_at_least: if provided, updates should only happen if the
+              updated_at field is at least this time.
+
+        Raises:
+            ValueError: If the length of keys doesn't match the length of group_ids.
+        """
+
+    @abstractmethod
+    async def aupdate(
+        self,
+        keys: Sequence[str],
+        *,
+        group_ids: Optional[Sequence[Optional[str]]] = None,
+        time_at_least: Optional[float] = None,
+    ) -> None:
+        """Upsert records into the database.
+
+        Args:
+            keys: A list of record keys to upsert.
+            group_ids: A list of group IDs corresponding to the keys.
+            time_at_least: if provided, updates should only happen if the
+              updated_at field is at least this time.
+
+        Raises:
+            ValueError: If the length of keys doesn't match the length of group_ids.
+        """
+
+    @abstractmethod
+    def exists(self, keys: Sequence[str]) -> List[bool]:
+        """Check if the provided keys exist in the database.
+
+        Args:
+            keys: A list of keys to check.
+
+        Returns:
+            A list of boolean values indicating the existence of each key.
+        """
+
+    @abstractmethod
+    async def aexists(self, keys: Sequence[str]) -> List[bool]:
+        """Check if the provided keys exist in the database.
+
+        Args:
+            keys: A list of keys to check.
+
+        Returns:
+            A list of boolean values indicating the existence of each key.
+        """
+
+    @abstractmethod
+    def list_keys(
+        self,
+        *,
+        before: Optional[float] = None,
+        after: Optional[float] = None,
+        group_ids: Optional[Sequence[str]] = None,
+        limit: Optional[int] = None,
+    ) -> List[str]:
+        """List records in the database based on the provided filters.
+
+        Args:
+            before: Filter to list records updated before this time.
+            after: Filter to list records updated after this time.
+            group_ids: Filter to list records with specific group IDs.
+            limit: optional limit on the number of records to return.
+
+        Returns:
+            A list of keys for the matching records.
+        """
+
+    @abstractmethod
+    async def alist_keys(
+        self,
+        *,
+        before: Optional[float] = None,
+        after: Optional[float] = None,
+        group_ids: Optional[Sequence[str]] = None,
+        limit: Optional[int] = None,
+    ) -> List[str]:
+        """List records in the database based on the provided filters.
+
+        Args:
+            before: Filter to list records updated before this time.
+            after: Filter to list records updated after this time.
+            group_ids: Filter to list records with specific group IDs.
+            limit: optional limit on the number of records to return.
+
+        Returns:
+            A list of keys for the matching records.
+        """
+
+    @abstractmethod
+    def delete_keys(self, keys: Sequence[str]) -> None:
+        """Delete specified records from the database.
+
+        Args:
+            keys: A list of keys to delete.
+        """
+
+    @abstractmethod
+    async def adelete_keys(self, keys: Sequence[str]) -> None:
+        """Delete specified records from the database.
+
+        Args:
+            keys: A list of keys to delete.
+        """