Rename TileMap/GridMap.world_to_map and opposite to local_to_map

[Mickeon]

(Partially) closes godotengine/godot-proposals#4535.

For both TileMap and GridMap:

• world_to_map -> local_to_map
• map_to_world -> map_to_local

(This screenshot may not accurately represent the description in the PR)

Also changes any mention of "world" in this context to "local" to avoid future confusion.

Finally, updates the Documentation of both methods for consistency.
In particular, adding a note on how to convert the returned values from local to global coordinates and vice versa.

Very glad of this one. I use this method frequently and I want more people to properly understand what it does.

[Mickeon]

Am a dummy.

This is off-topic, but this conversion logic could use some type checking. I was thinking back to #64377 and how hard it would be to properly recognise and convert due of how vague the original name is...

[groud]

I think the conversion is still missing for the tilemap's functions though. Since it works with Vector3i, it should also work with a Vector2i I guess?

[Mickeon]

Indeed, it is missing. That's because unfortunately the conversion tool currently has no way to tell what Class the renamed method is associated to, so it looks like it'll convert every method name regardless of context.

If I had the time to concoct... basically a rework of the entire process I would've certainly done it, but actually detecting from what class type the method is from (accounting for user-defined methods too), with or without optional typing/type inference, looks to be insurmountable in my eyes. Certainly possible, but not nearly as simple as a String replacement.

[akien-mga]

Looks good.

[Mickeon]

Rebased, and actually fixed the faulty world_to_map conversion.

Changes done.

[akien-mga]

Changes done.

Actually might need double checking by @groud, I assumed the above but Yuri tells me this was still be discussed on chat yesterday.

Edit: Confirmed good to merge by groud.

[akien-mga]

Thanks!