FEATURE: Saving & Loading game data

[mroobit]

Tasks

• [x] Design save file
• [x] Saving game data to save file
• [x] Loading game data from save file

[mroobit]

Data that will need to be saved/loaded:

• Save File Name
• Levels completed
• Character location in world
• Lives
• Points
• Quest items, if included in game
• Count (game)

A simple-ish way to handle this might be to store full (world and level) Character and Game struct data? (and necessarily View for Character structs).

[mroobit]

Added 2023 March 3 (relevant commit)