Feat: Social Lyric Sharing

### 🚀 The feature

Implemented a feature to share lyrics as an image card. Added LyricCard widget and integrated share_plus.

### Motivation, pitch

Currently, users can listen to stories and lyrics but lack a visual way to share their favorite moments or quotes with friends on social media. Text-only sharing is less engaging and doesn't showcase the app's visual identity.

Pitch I successfully implemented a Social Lyric Sharing feature that allows users to generate beautiful, shareable image cards of the current lyric line.