Debugging Load/Save Persistence

[Malcolmnixon]

This pull request improves the persistence mechanism by:

• Applying a standard "PersistentXXXX" naming convention to persistence objects
• Adding wrist UI for save and quit
• Adding Backpack, Toolbox and Shared Storage
• Moving all new/load/save game logic to GameState
• Introducing PersistentConfig resource for standard game settings
• Switched to notifications for storage events

Note: After discussing with @DigitalN8m4r3 we found a simpler way of exposing the game settings. The game_state.tscn is added as a singleton with its populated properties. This lets the user edit its properties in the inspector:

[DigitalN8m4r3]

lgtm gotta say, incredible work @Malcolmnixon

[BastiaanOlij]

Note: After discussing with @DigitalN8m4r3 we found a simpler way of exposing the game settings. The game_state.tscn is added as a singleton with its populated properties. This lets the user edit its properties in the inspector:

I did not know you had access to that, that is super cool!