Add Kid Mode Support

[EmmetSchuler]

Disable all communications for the user when kid mode is enabled.

Implement a password system when setting up kid mode, and have it sync with the website.

[serrq]

Very good idea. Oe maybe internet yes but with some.restrictions...

[jarro2783]

I have an account with kid mode enabled and it still allows chat to be sent. I thought the website API would probably not allow but it seems like it has to be implemented in the app.

[ornicar]

hmm yeah that's actually very important.

[tom-anders]

https://github.com/lichess-org/mobile/pull/1610 disables chat if the account is in kid mode.

For future reference, to implement enabling/disabling kid mode the API would be https://lichess.org/api#tag/Account/operation/accountKidPost

[tom-anders]

(whoops, closing the issue was a classic mouse slip ♟)

[veloce]

Chat was removed, but real kid mode support means it can be changed in the settings.

[moeenuddinbhuiyan]

What's the purpose of kid mode in lichess?

[kuvam]

I concur that restrictions should (also) be implemented in the api, not just left to the frontends.