`make_localai` factory and `LocalAI` demo notebook (#9151)

CHANGELOG.md

docs/api_reference/llms/openai_like.rst

docs/examples/llm/localai.ipynb

llama_index/llms/__init__.py

llama_index/llms/localai.py

llama_index/llms/openai_like.py

tests/llms/test_localai.py

tests/llms/test_openai_like.py