fix: 修复QQ音乐歌词API接入问题并改进歌词解析

QQ Music API fixes:
- Add Base64 encoding for songName/singerName/albumName in lyric request
- Fix API params: ct=11, cv=1003006/2111, tmeAppID=qqmusiclight, grp=1
- Add LRC fallback request when qrcT != 0
- Remove unused QQMusic C API and related model files

Lyric parsing improvements:
- Add JSON verbatim line parsing in YRCParser for metadata lines
- Validate YRC content instead of just null check in LyricUtils
- Improve TranslationHelper with interval matching and yield mechanism
- Fix QRCUtils to extract XML lyric tags for translations
- Add isQRC flag and lrcContent to LyricSourceData.QQMusic

Author: ljyh223