feat: add initial Slidev presentation and demo components

- Created Slidev presentation structure with index.md and contents.md.
- Implemented footer and menu components for navigation.
- Added Markdown preview component with syntax highlighting.
- Developed HTML template for consistent page structure.
- Introduced button component with variant support.
- Added Vue counter component for interactive demos.
- Configured content collections for documentation.
- Created multiple markdown documents for demo purposes.
- Established global and theme styles for consistent UI.
- Set up TypeScript configuration for better development experience.

solution/components.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/styles/global.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "registries": {}
+}