Invoke the Steam Virtual Keyboard for text entry on Steam Deck

[jukibom]

ISteamUtils Interface provides the ShowFloatingGamepadTextInput and FloatingGamepadTextInputDismissed_t member function which allow you to open the on-screen keyboard and also be notified when it is closed. The following text fields do not trigger the on-screen keyboard: in game chat, changing the amount of players for a server, and inputting a seed and the dev option as well.