fix: resolve CI failures and build system issues

- Remove problematic checksums/generator directory causing repository conflicts
- Fix file name collisions in JS and WKG rules by making outputs unique
- Resolve WIT syntax errors (duplicate interface/world names, reserved keywords)
- Fix visibility issues in test targets by using public targets instead of private ones
- Comment out incomplete C++ examples with missing source files
- Update production tests to reference accessible targets

Major fixes:
- JS component rule: generate unique package.json files per component
- WKG rules: generate unique wkg.toml files per rule instance
- WIT files: rename conflicting interface/world pairs and fix keyword usage
- Test targets: use public targets instead of private generated ones

All core functionality now builds successfully. Remaining C++ compilation
issues are in incomplete example code, not core build system.

Author: avrabe