feat: add danmuku plugin documentation and i18n setup guide

- Created a new documentation file for the danmuku plugin with code examples for usage.
- Added a new i18n setup guide, detailing language settings, default languages, and how to import and modify languages.
- Included code snippets for initializing the Artplayer with different languages and examples for adding new languages.

docs/document/assets/en_advanced_plugin.md.Cnaq654P.lean.js

@@ -0,0 +1 @@
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