Add comprehensive component library and demo application

Added extensive component library with feedback components (empty state, loading spinner, skeleton loader), enhanced form components (autocomplete, date picker, file upload, form field, time picker), navigation components (pagination), and overlay components (backdrop, drawer, modal, overlay container). Updated demo application with comprehensive showcase components and enhanced styling throughout the project. Excluded font files from repository to reduce size.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -40,3 +40,14 @@ testem.log
 # System files
 .DS_Store
 Thumbs.db
+dist/
+.angular/
+
+# Font files and directories
+*.woff
+*.woff2
+*.eot
+*.ttf
+*.otf
+assets/fonts/
+projects/demo-ui-essentials/public/fonts/