v0.0.19

• |NEW| Main menu with placeholder side menus
• |NEW| Scene Load Manager with scene transitioning
• |NEW| Ingame menu with some options
• |CHANGE| Move controls info to ingame menu
• |CHANGE| Cut version number to v0.0.0 format

This part was not super easy, but important. I've started from Main Menu and setup Scene Loader. Figured out how to make async scene loading and show progress.

Also I moved some UI to Ingame menu and removed some keys, to simplify controls. Plan to add some non game features into menu, so you don't need to mix game logic and utilities like cheats and hiding UI