Mehdi zare/fmp data doc (#29219)

Title: community: add Financial Modeling Prep (FMP) API integration

Description: Adding LangChain integration for Financial Modeling Prep
(FMP) API to enable semantic search and structured tool creation for
financial data endpoints. This integration provides semantic endpoint
search using vector stores and automatic tool creation with proper
typing and error handling. Users can discover relevant financial
endpoints using natural language queries and get properly typed
LangChain tools for discovered endpoints.

Issue: N/A

Dependencies:

fmp-data>=0.3.1
langchain-core>=0.1.0
faiss-cpu
tiktoken
Twitter handle: @mehdizarem

Unit tests and example notebook have been added:

Tests are in tests/integration_tests/est_tools.py and
tests/unit_tests/test_tools.py
Example notebook is in docs/tools.ipynb
All format, lint and test checks pass:

pytest
mypy .
Dependencies are imported within functions and not added to
pyproject.toml. The changes are backwards compatible and only affect the
community package.

---------

Co-authored-by: mehdizare <[email protected]>
Co-authored-by: Chester Curme <[email protected]>

Author: MehdiZare

docs/docs/integrations/providers/fmp-data.mdx

@@ -0,0 +1,21 @@
+# FMP Data (Financial Data Prep)
+
+> [FMP-Data](https://pypi.org/project/fmp-data/) is a python package for connecting to
+> Financial Data Prep API. It simplifies how you can access production quality data.
+
+
+## Installation and Setup
+
+Get an `FMP Data` API key by
+visiting [this page](https://site.financialmodelingprep.com/pricing-plans?couponCode=mehdi).
+ and set it as an environment variable (`FMP_API_KEY`).
+
+Then, install [langchain-fmp-data](https://pypi.org/project/langchain-fmp-data/).
+
+## Tools
+
+See an [example](https://github.com/MehdiZare/langchain-fmp-data/tree/main/docs).
+
+```python
+from langchain_fmp_data import FMPDataTool, FMPDataToolkit
+```