Let servers know the player’s GUI Scale to adapt dialogs

Please add an optional field to the Java Edition Client Information packet reporting the player’s effective GUI Scale (the resolved value when set to Auto), sent on connection and whenever it changes. Dialog layouts are fixed by the server, so a dialog that fits one scale can be cramped or overflow at another. This value would let servers adapt dialog width and content to each player. It would be strictly informational, servers could not change the setting, and players could opt out of sharing it.