Save/load the game save from the SD card [REQUEST]

[GRAnimated]

The current File menu is lackluster and only lets you pick between the saves in your user's save data. Loading from the SD card would mean that people could more easily load custom saves, or save a specific moment and load it continuously, named to what they want. Additionally, it could make testing DebugSaveData.szs saves easier, if it could read from the archive.

Saves could go in a Lunakit/LKData/SaveData folder, and the game would read from it recursively, so folders can sort the saves inside. LunaKit should then be able to save to the folder, where you can make new folders and put saves in them.