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/agent_toolkits/steam/toolkit.py

@@ -0,0 +1,48 @@
+"""Steam Toolkit."""
+from typing import List
+
+from langchain_community.agent_toolkits.base import BaseToolkit
+from langchain_community.tools import BaseTool
+from langchain_community.tools.steam.prompt import (
+    STEAM_GET_GAMES_DETAILS,
+    STEAM_GET_RECOMMENDED_GAMES,
+)
+from langchain_community.tools.steam.tool import SteamWebAPIQueryRun
+from langchain_community.utilities.steam import SteamWebAPIWrapper
+
+
+class SteamToolkit(BaseToolkit):
+    """Steam Toolkit."""
+
+    tools: List[BaseTool] = []
+
+    @classmethod
+    def from_steam_api_wrapper(
+        cls, steam_api_wrapper: SteamWebAPIWrapper
+    ) -> "SteamToolkit":
+        operations: List[dict] = [
+            {
+                "mode": "get_games_details",
+                "name": "Get Games Details",
+                "description": STEAM_GET_GAMES_DETAILS,
+            },
+            {
+                "mode": "get_recommended_games",
+                "name": "Get Recommended Games",
+                "description": STEAM_GET_RECOMMENDED_GAMES,
+            },
+        ]
+        tools = [
+            SteamWebAPIQueryRun(
+                name=action["name"],
+                description=action["description"],
+                mode=action["mode"],
+                api_wrapper=steam_api_wrapper,
+            )
+            for action in operations
+        ]
+        return cls(tools=tools)
+
+    def get_tools(self) -> List[BaseTool]:
+        """Get the tools in the toolkit."""
+        return self.tools