refactor: split CommandFooter, perf tweaks

- extracted drawer modal to CommandDrawer (~180 lines)
- CommandFooter now under 270 lines
- replaced transition-all with specific props (colors, transform, etc)
- should reduce repaints on hover states

src/lib/scripts/index.ts

@@ -1,6 +1,4 @@
-/**
- * Script generator index - re-exports all distro generators
- */
+// Re-exports all distro script generators
 
 export { escapeShellString, getSelectedPackages, type PackageInfo } from './shared';
 export { generateUbuntuScript } from './ubuntu';