feat: add danmuku plugin and i18n setup documentation

- Created a new documentation file for the danmuku plugin with code examples.
- Added a new documentation file for language settings (i18n) with detailed instructions on language imports, default languages, and how to add or modify languages.
- Included code snippets for initializing the Artplayer with different language settings.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "artplayer-packages",
   "type": "module",
-  "version": "6.0.0",
+  "version": "6.1.0",
   "private": true,
   "description": "ArtPlayer.js is a modern and full featured HTML5 video player",
   "workspaces": [