Initial commit: modern React video player library

Add all source files for a feature-rich, reusable video player built with React, TypeScript, and Vite. Includes core components, context, hooks, utilities, styles, demo app, and configuration files.

vite.config.lib.ts

@@ -0,0 +1,31 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import path from 'path'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  build: {
+    lib: {
+      entry: path.resolve(__dirname, 'src/index.ts'),
+      name: 'VideoPlayer',
+      formats: ['es', 'umd'],
+      fileName: (format) => `video-player.${format === 'es' ? 'js' : 'umd.cjs'}`,
+    },
+    rollupOptions: {
+      external: ['react', 'react-dom'],
+      output: {
+        globals: {
+          react: 'React',
+          'react-dom': 'ReactDOM',
+        },
+      },
+    },
+    cssCodeSplit: false,
+  },
+})