Add EDITMODE_PRIORITY for ATLAS_TILE

[guilhermefelipecgs]

Fix #24549.
Now it's possible to randomize ATLAS_TILE based on defined priority.

[CowThing]

How does this work with _forward_subtile_selection in GDScript? It looks like there's now two methods with the same name but different arguments?

[guilhermefelipecgs]

Unfortunately gdscript will not accept two methods with the same name and different signatures, then I changed for _forward_atlas_subtile_selection.

[txigreman]

Maybe what I'm going to say it's stupid, but could "atlas tiles with priority" be implemented as autotiles with a 1x1 bitmask? Would that help to avoid having duplicated logic in different tile types?

[guilhermefelipecgs]

Autotile with 1x1 bitmask doesn't make sense. AFAIK, the only way to get the same result using autotile is using the new wildcard feature #27565 with 3x3 bitmask and setting the center bitmask to on and all corners to wildcard.

Would that help to avoid having duplicated logic in different tile types?

I don't understand why you think the logic is duplicated. Atlastile don't have bitmask, so, the code is a little different.

[insomnius]

I really need this.

[akien-mga]

Thanks!