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/tools/file_management/write.py

@@ -0,0 +1,51 @@
+from typing import Optional, Type
+
+from langchain_core.callbacks import CallbackManagerForToolRun
+from langchain_core.pydantic_v1 import BaseModel, Field
+from langchain_core.tools import BaseTool
+
+from langchain_community.tools.file_management.utils import (
+    INVALID_PATH_TEMPLATE,
+    BaseFileToolMixin,
+    FileValidationError,
+)
+
+
+class WriteFileInput(BaseModel):
+    """Input for WriteFileTool."""
+
+    file_path: str = Field(..., description="name of file")
+    text: str = Field(..., description="text to write to file")
+    append: bool = Field(
+        default=False, description="Whether to append to an existing file."
+    )
+
+
+class WriteFileTool(BaseFileToolMixin, BaseTool):
+    """Tool that writes a file to disk."""
+
+    name: str = "write_file"
+    args_schema: Type[BaseModel] = WriteFileInput
+    description: str = "Write file to disk"
+
+    def _run(
+        self,
+        file_path: str,
+        text: str,
+        append: bool = False,
+        run_manager: Optional[CallbackManagerForToolRun] = None,
+    ) -> str:
+        try:
+            write_path = self.get_relative_path(file_path)
+        except FileValidationError:
+            return INVALID_PATH_TEMPLATE.format(arg_name="file_path", value=file_path)
+        try:
+            write_path.parent.mkdir(exist_ok=True, parents=False)
+            mode = "a" if append else "w"
+            with write_path.open(mode, encoding="utf-8") as f:
+                f.write(text)
+            return f"File written successfully to {file_path}."
+        except Exception as e:
+            return "Error: " + str(e)
+
+    # TODO: Add aiofiles method