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/tests/integration_tests/llms/test_replicate.py

@@ -0,0 +1,46 @@
+"""Test Replicate API wrapper."""
+
+from langchain_core.callbacks import CallbackManager
+
+from langchain_community.llms.replicate import Replicate
+from tests.unit_tests.callbacks.fake_callback_handler import FakeCallbackHandler
+
+TEST_MODEL = "replicate/dolly-v2-12b:ef0e1aefc61f8e096ebe4db6b2bacc297daf2ef6899f0f7e001ec445893500e5"  # noqa: E501
+
+
+def test_replicate_call() -> None:
+    """Test simple non-streaming call to Replicate."""
+    llm = Replicate(model=TEST_MODEL)
+    output = llm("What is LangChain")
+    assert output
+    assert isinstance(output, str)
+
+
+def test_replicate_streaming_call() -> None:
+    """Test streaming call to Replicate."""
+    callback_handler = FakeCallbackHandler()
+    callback_manager = CallbackManager([callback_handler])
+
+    llm = Replicate(streaming=True, callback_manager=callback_manager, model=TEST_MODEL)
+    output = llm("What is LangChain")
+    assert output
+    assert isinstance(output, str)
+
+
+def test_replicate_model_kwargs() -> None:
+    """Test simple non-streaming call to Replicate."""
+    llm = Replicate(
+        model=TEST_MODEL, model_kwargs={"max_length": 100, "temperature": 0.01}
+    )
+    long_output = llm("What is LangChain")
+    llm = Replicate(
+        model=TEST_MODEL, model_kwargs={"max_length": 10, "temperature": 0.01}
+    )
+    short_output = llm("What is LangChain")
+    assert len(short_output) < len(long_output)
+    assert llm.model_kwargs == {"max_length": 10, "temperature": 0.01}
+
+
+def test_replicate_input() -> None:
+    llm = Replicate(model=TEST_MODEL, input={"max_length": 10})
+    assert llm.model_kwargs == {"max_length": 10}