Add SRT/FLV/RTMP support and update documentation

Introduced Python scripts for SRT subtitle checking and fixing, and added comprehensive documentation covering advanced features such as protocol detection, subtitle/audio/quality management, keyboard shortcuts, and touch gestures. Updated local settings to allow new build and Python commands, added TypeScript definitions for FLV, and implemented RTMP/FLV protocol support in the player. Removed CHANGELOG.md and made various improvements to styles and example app.

vite.config.ts

@@ -5,6 +5,7 @@ import path from 'path'
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [react()],
+  base: '/player/',
   resolve: {
     alias: {
       '@': path.resolve(__dirname, './src'),