Placeholder to check if the player is under water

[Ranksu10]

It could be a good idea to implement a placeholder that recognizes if the player in under water (or has the bubbles hud triggered)

This is specially to avoid this kind of situations (image above).

Currently, there is no placeholder that recognizes that.

%player_remaining_air% works but not when the player has water breathing effect.
Adding another condition like %player_has_potioneffect_water_breathing% will just make both conditions enter in conflict and will not properly work.