Update README.md

[jdblackstar]

Description

Update README.md to fix broken documentation paths and add missing link to the prime-rl repo

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

• All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

Documentation-only change. No code or tests affected.

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Note

Low Risk
Documentation-only changes (links/paths) with no runtime, API, or data-handling impact.

Overview
Fixes README links by updating the documentation section to point to docs/*.md paths instead of broken root-level *.md files.

Also corrects the v0.1.7 news entry to include a direct hyperlink to the prime-rl GitHub repo.

^{Written by Cursor Bugbot for commit 928ff5a. This will update automatically on new commits. Configure here.}

[CLAassistant]

All committers have signed the CLA.