Updated README information for PyPi

Full Changelog: v0.4.0...v0.4.1

Draft first release

What's Changed

• Add full AutoGen-based functionality
• Add GEval evals for ResumeRetriever, Critic, and Writer by @shippy in #7
• Add CLI by @shippy in #8

Full Changelog: https://github.com/shippy/cover_letter_automation/commits/0.4.0