[release] 🔧 5.7.1

[release] ✨ 5.7.0

[release] ⬆️ bumped version code

[release] 🔧 fixes #223

* 🔧 fix synced lyrics and move to jdk 21
* 👷 Bump JDK to 21 in CI workflows

[release] 🔧 bug fixes

[release] ✨ metadata updates

[release] 🔧 removed unneeded network calls

[release] ✨ Decorations and fixes #203

* 🔧 fixed local search #201
* 🔧 removed aboutlibraries
* ✨ revamped root settings page
* ✨ revamped backup page
* ✨ revamped look and feel page
* ✨ tweaked saved page
* 🔧 prettified readme and added prefill #198

[release] 🔧 updated screenshots

* fixed AboutLibrariesPage.kt

[release] 🔧 fix changelog