feat/migrate-to-sdk
main
Replace hardcoded MOCHA dict with kindred_sdk.get_theme_tokens(). Add sdk dependency to package.xml <kindred> element.
Declares min_create_version=0.1.0, load_priority=50, pure_python=true, and documents partdesign.body/feature context injection.
Change viewport background from 2-color Base→Crust gradient to 3-color Overlay0→Mantle→Overlay0 gradient for better visual depth.