Create Setup Assistant

[alicerunsonfedora]

Objective

The Setup Assistant should be a standardized set of instructions that all Ren'Py projects should follow. These more or less include the following (may or may not be in order):

• Welcome screen
• Prompt for user's name
• Setting default permissions for applets
• Enabling or disabling certain applets
• Review of GNU GPL v3
• Review of GOBFADU policy
• <Spot to be edited at AliceOS OEM's discretion>
• "Finalizing setup" screen

Design

Design wise, we might want to opt for something like the macOS Setup Assistant or the Windows 10 post-install assistant:

[alicerunsonfedora]

The new Setup Assistant has been implemented into DDTAR, so we may want to start generalizing it specifically for AliceOS itself.