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>

tsconfig.json

@@ -14,6 +14,17 @@
     "esModuleInterop": true,
     "experimentalDecorators": true,
     "moduleResolution": "bundler",
+    "paths": {
+      "shared-ui": [
+        "./dist/shared-ui"
+      ],
+      "shared-utils": [
+        "./dist/shared-utils"
+      ],
+      "ui-essentials": [
+        "./dist/ui-essentials"
+      ]
+    },
     "importHelpers": true,
     "target": "ES2022",
     "module": "ES2022"