Add comprehensive semantic design token system

Implement complete semantic layer for all design tokens including typography, spacing, motion, colors, borders, shadows, z-index, opacity, and glass effects. Each semantic token maps base design tokens to contextual usage patterns for improved maintainability and developer experience.

Features:
- Complete semantic typography system with font weights, sizes, line heights, and letter spacing
- Comprehensive spacing tokens for components, layouts, and interactions
- Full motion system with durations, easing, transitions, and hover transforms
- Semantic color system with individual access to all Material Design 3 colors
- Border tokens with widths, radius, and styles for all use cases
- Shadow system including standard and AI-themed shadows
- Z-index layering system for proper stacking context
- Opacity tokens for transparency and visibility states
- Glass morphism tokens with blur, opacity, and theming support

All semantic tokens provide direct access to base token values while offering meaningful contextual aliases for common UI patterns.

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

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

projects/shared-ui/ng-package.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
+  "dest": "../../dist/shared-ui",
+  "lib": {
+    "entryFile": "src/public-api.ts"
+  },
+  "assets": [
+    "src/styles/**/*.scss"
+  ]
+}