v1.0.0: Initial commit: CAD Preload Plugin for Forge/Fabrikator

- Preloads CAD library documentation into agent context
- BOSL2 quick reference, tutorials, and code examples
- Lists available libraries (BOSL2, threads-scad, dotSCAD, Round-Anything, NopSCADlib)
- 21 tutorials covering attachments, shapes, transforms, paths, and more
- 8 code examples demonstrating common patterns
- Config-only plugin - no backend required
- Uses contentFromAssets for dynamic content loading