Physics colliders do not work properly for isometric (diamond) maps

[adrien-bon]

When using an isometric maps, physics colliders :

• have their origin at the correct position (fixed in commit 839110b)
• but they don"t have the proper shape

It's because Tiled does not handle objects for isometric maps the way it does for orthogonal / hexagonal maps.
On isometric maps, objects are "projected" on the isometric plane: we need to do the same when spawning colliders.

Example in Tiled:

What it does under Bevy / bevy_ecs_tiled:

One possible fix would be to change the shape and convert all vertexes coordinates using the utils::from_isometric_coords_to_bevy function.
Like, for instance, if we have a rectangle, spawn a polyline instead and update its vertexes.

[darkautism]

Giving each brick a collider would cause the game to be very laggy, so I created a collider that encompassed the entire map, but the game actually gave me the rectangle