Initial commit - Angular library: ui-essentials

🎯 Implementation Complete!

This library has been extracted from the monorepo and is ready for Git submodule distribution.

Features:
- Standardized SCSS imports (no relative paths)
- Optimized public-api.ts exports
- Independent Angular library structure
- Ready for consumer integration as submodule

🚀 Generated with Claude Code (https://claude.ai/code)

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

src/lib/components/buttons/index.ts

@@ -0,0 +1,8 @@
+export * from './button.component';
+export * from './text-button.component';
+export * from './ghost-button.component';
+export * from './fab.component';
+export * from './fab-menu';
+export * from './simple-button.component';
+export * from './split-button';
+export * from './icon-button';