feat: Needle Search Tool With Template

[JANHMS]

Overview

Adding Needle as a Tool to Langflow to enable dynamic integration with other tools e.g. CrewAI. While the existing Needle Bundle provides comprehensive but static search across data sources, this new component offers a flexible tool-based approach, complementing the current functionality.

Dependency

Adding top_k as a param to the Langchain integration:
langchain-ai/langchain#29821

Invoice Summarizer Template using Langflow Agent

[autofix-ci]

Hi! I'm autofix.ci, a bot that automatically fixes trivial issues such as code formatting in pull requests.

I would like to apply some automated changes to this pull request, but it looks like I don't have the necessary permissions to do so. To get this pull request into a mergeable state, please do one of the following two things:

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[JANHMS]

@ogabrielluiz

[codspeed-hq]

CodSpeed Performance Report

Merging #6648 will improve performances by 56.45%

_{Comparing needle-ai:main (0229be2) with main (a8f4090)}

Summary

⚡ 2 improvements
✅ 17 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	test_build_flow_invalid_job_id	12.5 ms	8 ms	+56.45%
⚡	test_cancel_nonexistent_build	13.6 ms	9.7 ms	+40.94%

[edwinjosechittilappilly]

@JANHMS I am still unable to push changes to this PR.

[JANHMS]

@JANHMS I am still unable to push changes to this PR.

Is that resolved?