Add AI config README with skills and rules reference

[catalinradoiu]

Task/Issue URL: https://app.asana.com/1/137249556945/project/1211724162604201/task/1214927988557609

Description

Adds .claude/README.md as a human-facing index of all AI agent configuration in this repo — the skills engineers can invoke and the rules agents must follow. .cursor/README.md is a symlink to the same file, following the established mirror pattern.

The README covers:

• Each skill with what it does and how to trigger it (natural language or /skill-name)
• Each rule file with a one-line description of what it covers, plus a note on when each tool loads them

Steps to test this PR

• Open .claude/README.md and verify skills and rules are listed accurately
• Verify .cursor/README.md is a symlink pointing to ../../.claude/README.md

UI changes

Before	After
No UI changes	No UI changes

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Note

Low Risk
Documentation-only change with no runtime, build, or product code impact.

Overview
Adds .claude/README.md, a human-facing index of AI agent setup in the repo: how skills are invoked (natural language or /skill-name), a table of each skill with triggers, and a table of rule files with one-line scope plus when Claude vs Cursor load them. It also states that .claude/ is source of truth and skills/rules are mirrored to .cursor/ via symlinks.

.cursor/README.md is updated to point at the same content (../.claude/README.md), matching the existing mirror pattern so both tool directories share one README.

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