feat: track caching and cached track export support (#2117)

* feat: add caching support with track metadata

* feat(settings): add cache music toggle

* fix(mobile): cache dir not open-able

* feat(local folder): add cache export/clear actions and size of the folder

* chore: ios deps upgrades

* chore: upgrade lint flutter version

* chore: lint secrets causing error

* cd: invalid value for env var