[Q Chat] Auto-read README.md for Context Awareness

[hsbakshi]

Currently, when using q chat in a project directory, users need to manually provide context about the project. However, most repositories already contain this information in their README.md files.

CLI CHAT should automatically detect and read the README.md file (if present) in the current working directory when initialized.

This would:

• Provide immediate project context without manual input
• Help generate more relevant and project-aware responses
• Save time by eliminating the need to paste README contents manually.

Implementation could:

1. Check for README.md existence on startup
2. Parse markdown content
3. Use content as initial context for the conversation
4. Allow users to opt-out via config setting
5. Support alternative README file formats (README.txt, README, etc.)

Benefits

• Improved developer experience
• More contextual responses
• Faster project onboarding
• Better alignment with repository's documented goals and structure

[hsbakshi]

This would also go well with the "/doc" feature to generate documentation that is in the Q IDE plugin.