Dwight/finance tool (#10674)

CONTRIBUTING.md

...grations/tools/llama-index-tools-yahoo-finance/.gitignore

...-integrations/tools/llama-index-tools-yahoo-finance/BUILD

...tegrations/tools/llama-index-tools-yahoo-finance/Makefile

...egrations/tools/llama-index-tools-yahoo-finance/README.md

...ma-index-tools-yahoo-finance/examples/yahoo_finance.ipynb

...tools-yahoo-finance/llama_index/tools/yahoo_finance/BUILD

...yahoo-finance/llama_index/tools/yahoo_finance/__init__.py

...ols-yahoo-finance/llama_index/tools/yahoo_finance/base.py

...rations/tools/llama-index-tools-yahoo-finance/poetry.lock

...ions/tools/llama-index-tools-yahoo-finance/pyproject.toml

...rations/tools/llama-index-tools-yahoo-finance/tests/BUILD

...s/tools/llama-index-tools-yahoo-finance/tests/__init__.py

...dex-tools-yahoo-finance/tests/test_tools_yahoo_finance.py