feat: add danmuku plugin documentation and i18n setup guide

- Created a new documentation file for the danmuku plugin with code examples.
- Added comprehensive language settings documentation, including default languages, importing languages, adding new languages, and modifying existing languages.
- Updated the i18n setup guide with code snippets for better clarity and usability.

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [5.3.0] - 2025-09-06
+
 - Rename `.esm.js` to `.mjs`
 - Remove the default `fill` color value of `svg`
 - Optimize the `autoOrientation` logic