feat(rules): add Error Recovery policy to shared rules

[JeremyDev87]

Background

The Error Recovery rules currently exist only in CLAUDE.md (project root, Claude Code specific):

## Error Recovery
- On CLI command failure, automatically try alternatives
- Do not wait for user confirmation on recoverable errors
- Only report to user on unrecoverable errors
- Never break the workflow on error

Other AI tools (Cursor, Codex, Q, Kiro, Antigravity) are unaware of this policy.

Proposed Fix

Add an Error Recovery section to packages/rules/.ai-rules/rules/core.md under the ACT mode section:

### Error Recovery (ACT mode)
- On recoverable errors (file not found, command failure, path issues), try alternatives immediately
- Do not wait for user confirmation on recoverable errors — recover immediately
- Only report to user on unrecoverable errors (auth failure, critical data loss risk)
- Never break the workflow on error — try alternatives and continue

Scope

• File: packages/rules/.ai-rules/rules/core.md
• The Error Recovery section in CLAUDE.md can be replaced with a reference to shared rules
• Applies consistent Error Recovery policy across all AI tools