feat: add short URL and multi-page video support

[ParrotXray]

Changes

Short URL Support

• Added resolveShortUrl() method to handle b23.tv short links
• Automatically resolves short URLs before pattern matching in resolve()

Multi-Page Video Handling

• Implemented extractPageParameter() to parse ?p=X from URLs
• loadSingleVideo() - Returns single track for videos with one part
• loadVideoPage() - Returns specific page when ?p=X is specified
• loadVideoAnthology() - Returns playlist for multi-page videos without page parameter

Anti-Bot Protection

• Added generateBuvid3() and generateBuvid4() methods
• Implemented buildCookieHeader() to generate required cookies

Why

Users frequently share b23.tv links from mobile apps, but they weren't working.
Many Bilibili videos have multiple parts (e.g., music albums, tutorial series), users expect to either play a specific part or get the full playlist.

Checkmarks

• The modified endpoints have been tested.
• Used the same indentation as the rest of the project.
• Still compatible with LavaLink clients.

Additional information

The source currently has an upstream stream aborted issue, making seek unusable.

[1Lucas1apk]

Thank you very much for your contribution :)