Feature Request: KIOSK Mode

[johnnyq]

Enable Option for Kiosk mode in the settings
When Enabled have the ability to set a pin to and do the following

Disable Adding and Deleting Games and Playlists but keep the ability to delete save states
Disable Access to the following Setting

• Network (Wi-Fi) Settings
• Video Monitor Index
• Show Hidden Files
• SSH
• Samba

Also Disable:

• Updater
• Load Core
• Load Game

Also Disable Quick menu Options for each console emulator

[bagelbyheart]

Most of this could be handled via the existing show/hide menu framework. The "tough" part would be adding an interface for entering a pin to toggle it. @johnnyq if you're still around and care about this, would a settings.toml flag without a GUI interface work instead?