feat(v7): VIBEE Self-Improver spec with 20 behaviors

New specs/tri/vibee_self_improver.vibee with:
- 18 core behaviors with real implementations
- analyzeGeneratedCode: scans for TODO, empty bodies
- detectStubPatterns: finds stub locations with line numbers
- suggestImplementation: generates code from pattern registry
- autoPatchPatterns: applies improvements to source files
- regenerateSelf: zig build vibee -- gen loop
- runImprovementCycle: full analyze-suggest-patch-validate loop
- +11 supporting behaviors

Generated code: 842 lines with 28 functions

φ² + 1/φ² = 3 = TRINITY

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: gHashTag