docs: add Timbr tools integration (#32862)

# feat(integrations): Add Timbr tools integration

## DESCRIPTION

This PR adds comprehensive documentation and integration support for
Timbr's semantic layer tools in LangChain.

[Timbr](https://timbr.ai/) provides an ontology-driven semantic layer
that enables natural language querying of databases through
business-friendly concepts. It connects raw data to governed business
measures for consistent access across BI, APIs, and AI applications.

[`langchain-timbr`](https://pypi.org/project/langchain-timbr/) is a
Python SDK that extends
[LangChain](https://github.com/WPSemantix/Timbr-GenAI/tree/main/LangChain)
and
[LangGraph](https://github.com/WPSemantix/Timbr-GenAI/tree/main/LangGraph)
with custom agents, chains, and nodes for seamless integration with the
Timbr semantic layer. It enables converting natural language prompts
into optimized semantic-SQL queries and executing them directly against
your data.

**What's Added:**
- Complete integration documentation for `langchain-timbr` package
- Tool documentation page with usage examples and API reference

**Integration Components:**
- `IdentifyTimbrConceptChain` - Identify relevant concepts from user
prompts
- `GenerateTimbrSqlChain` - Generate SQL queries from natural language
- `ValidateTimbrSqlChain` - Validate queries against knowledge graph
schemas
- `ExecuteTimbrQueryChain` - Execute queries against semantic databases
- `GenerateAnswerChain` - Generate human-readable answers from results

## Documentation Added

- `/docs/integrations/providers/timbr.mdx` - Provider overview and
configuration
- `/docs/integrations/tools/timbr.ipynb` - Comprehensive tool usage
examples

## Links

- [PyPI Package](https://pypi.org/project/langchain-timbr/)
- [GitHub Repository](https://github.com/WPSemantix/langchain-timbr)
- [Official
Documentation](https://docs.timbr.ai/doc/docs/integration/langchain-sdk/)

---------

Co-authored-by: Mason Daugherty <mason@langchain.dev>

libs/packages.yml

@@ -729,6 +729,10 @@ packages:
 - name: langchain-scrapeless
   repo: scrapeless-ai/langchain-scrapeless
   path: .
+- name: langchain-timbr
+  provider_page: timbr
+  path: .
+  repo: WPSemantix/langchain-timbr
 - name: langchain-zenrows
   path: .
   repo: ZenRows-Hub/langchain-zenrows