Release v2.0.0: The Vibe Code Edition

New Features:
- Vibe Code Detection (VIBE001-004): hallucinated imports, copy-paste artifacts, incomplete implementations, orphaned exports
- VibeScanner for cross-file AI-generated code analysis
- Security Posture Score (0-100) with visual bar
- ubon explain <rule> command for detailed rule info
- --preview-fixes for diff-like fix preview
- confidenceReason field on all findings
- All 15 scanners exported for programmatic use
- Cursor integration (docs/CURSOR.md, .cursor/rules/)

Architecture:
- Modular security rules (SEC001-SEC017 in src/rules/security/)
- BaseScanner with caching utilities
- CLI refactor with shared logic in src/cli/shared.ts
- Removed empty src/rules/registry.ts

Bug Fixes:
- Watch mode debounces rapid file changes
- Fixed VIBE001 import detection regex
- Fixed LSP server TextDocumentSyncKind import
- Verbose mode logs file read errors

Documentation:
- Streamlined README (651 -> 232 lines)
- Updated all version references to 2.0.0
- Added confidence scale documentation

Repository restructured into ubon/ subdirectory.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: luisfer