Add tools for reading and grepping csv/xls files

[amrit110]

Summary

Clickup Ticket(s): Link(s) if applicable.

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🔧 Refactoring (no functional changes)
• ⚡ Performance improvement
• 🧪 Test improvements
• 🔒 Security fix

Changes Made

• Add tools for fetching (downloading) files, searching within files and reading specific sections of files
• Add basic unit tests
• Update init file with new tools and constructor methods

Testing

• Tests pass locally (uv run pytest tests/)
• Type checking passes (uv run mypy <src_dir>)
• Linting passes (uv run ruff check src_dir/)
• Manual testing performed (describe below)

Manual testing details:

• Ran evals over a subset to check if the tools are being used correctly, i.e. agent is able to download CSV, search it and read it if needed.

Screenshots/Recordings

Related Issues

Deployment Notes

Checklist

• Code follows the project's style guidelines
• Self-review of code completed
• Documentation updated (if applicable)
• No sensitive information (API keys, credentials) exposed

[amrit110]

Merging this since its internally only used for knowledge_qa agent, has comprehensive tests.