* Refactor: Extract methods & reduce code duplication
* Refactor: Rename Sounds to SoundPlayer
* Refactor: Make UncivSound a data class
As far as I can see, UncivSoundConstants served no purpose
* Refactor: Reorder sounds
* Refactor: Split up ExtensionFunctions and move into own package
* Add multiplayer turn sound notification
* Refactor: Remove unnecessary double translation
* Refactor: Reduce code duplication
* Refactor: No if for boolean logic
