Align repository with llm-d repo template (4 items)

[clubanderson]

Summary

This repository does not fully conform to the llm-d repo template. The following items are missing or inconsistent and should be added or updated to maintain consistency across the organization.

Checklist

Linting / Config

• Add .gitignore
• Add .prowlabels.yaml
• Add .yamllint.yml
• Add pyproject.toml (pre-commit config)

Reference

Template repo: https://github.com/llm-d/llm-d-go-template