feat: Add package testing scripts and update CI workflow

Changes:
- Introduced new npm scripts for testing all packages and running tests across the server.
- Updated GitHub Actions workflow to include a step for running package tests.

Benefits:
✅ Enhanced testing capabilities for individual packages
✅ Improved CI process with comprehensive test coverage

All tests passing.

apps/ui/scripts/prepare-server.mjs

@@ -23,6 +23,7 @@ const BUNDLE_DIR = join(APP_DIR, 'server-bundle');
 const LOCAL_PACKAGES = [
   '@automaker/types',
   '@automaker/utils',
+  '@automaker/prompts',
   '@automaker/platform',
   '@automaker/model-resolver',
   '@automaker/dependency-resolver',