feat: migrate examples from prototype and add CSS modules support

- Migrate HTML and React demo applications from prototype to examples/ directory
- Add examples to workspace configuration with selective build support
- Update workspace scripts for library-only builds (build:libs) and example dev servers
- Fix React MediaProvider context conflicts by consolidating exports
- Add esbuild-css-modules-plugin for CSS modules support in React package
- Configure tsup for flattened output structure with CSS processing
- Update package exports and imports for new @vjs-10/* scoped packages

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

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

package.json

@@ -7,21 +7,25 @@
     "packages/core/*",
     "packages/html/*",
     "packages/react/*",
-    "packages/react-native/*"
+    "packages/react-native/*",
+    "examples/*"
   ],
   "scripts": {
     "build": "npm run build --workspaces --if-present",
+    "build:libs": "npm run build --workspace=packages/core/* --workspace=packages/html/* --workspace=packages/react/* --workspace=packages/react-native/*",
     "test": "npm run test --workspaces --if-present",
     "lint": "npm run lint --workspaces --if-present",
     "typecheck": "npm run typecheck --workspaces --if-present",
-    "clean": "npm run clean --workspaces --if-present"
+    "clean": "npm run clean --workspaces --if-present",
+    "dev:html": "npm run dev --workspace=examples/html-demo",
+    "dev:react": "npm run dev --workspace=examples/react-demo"
   },
   "devDependencies": {
-    "typescript": "^5.3.0",
     "@types/node": "^20.0.0",
     "@types/react": "^18.0.0",
     "react": "^18.0.0",
-    "tsup": "^8.0.0"
+    "tsup": "^8.0.0",
+    "typescript": "^5.3.0"
   },
   "engines": {
     "node": ">=18.0.0",