Add i18n, tests, and update documentation

Introduces internationalization (i18n) support with English and Turkish, adds unit tests and test setup with Vitest and React Testing Library, and updates documentation including README and changelog. Removes legacy publishing and usage guides, refactors components to use translation system, and updates build and test scripts in package.json. Also adds new utility modules for HLS and CORS, and improves PlayerContext and SettingsMenu for language support.

src/components/VideoPlayer.tsx

@@ -3,17 +3,28 @@ import { PlayerProvider, usePlayerContext } from '../contexts/PlayerContext'
 import { VideoElement } from './VideoElement'
 import { ControlsLayer } from './ControlsLayer'
 import type { VideoPlayerProps, AudioTrack, VideoQuality } from '../types'
-import { initializePolyfills } from '../utils/polyfills'
 import '../styles/variables.css'
 import './VideoPlayer.css'
 
-// Initialize polyfills once
+// Lazy load polyfills only if needed
 let polyfillsInitialized = false
-if (!polyfillsInitialized) {
-  initializePolyfills()
-  polyfillsInitialized = true
+const initializePolyfillsIfNeeded = async () => {
+  if (polyfillsInitialized) return
+
+  // Check if polyfills are needed
+  const needsFullscreenPolyfill = !document.fullscreenEnabled && !(document as any).webkitFullscreenEnabled
+  const needsPIPPolyfill = !('pictureInPictureEnabled' in document)
+
+  if (needsFullscreenPolyfill || needsPIPPolyfill) {
+    const { initializePolyfills } = await import('../utils/polyfills')
+    initializePolyfills()
+    polyfillsInitialized = true
+  }
 }
 
+// Initialize polyfills asynchronously
+initializePolyfillsIfNeeded()
+
 const VideoPlayerContent: React.FC<
   VideoPlayerProps & {
     audioTracks: AudioTrack[]
@@ -92,6 +103,7 @@ export const VideoPlayer: React.FC<VideoPlayerProps> = ({
   controls = true,
   subtitles = [],
   theme,
+  language,
   keyboardShortcuts = true,
   pictureInPicture = true,
   className = '',
@@ -129,7 +141,7 @@ export const VideoPlayer: React.FC<VideoPlayerProps> = ({
   }, [])
 
   return (
-    <PlayerProvider initialMuted={muted}>
+    <PlayerProvider initialMuted={muted} language={language}>
       <VideoPlayerContent
         src={src}
         poster={poster}