Granular configuration of debug render systems

[barsoosayque]

Objective

• Enable/disable debug render systems via run_if conditions.
• Configure what parts of the physics should be rendered, e.g. only colliders and body axes.
• Can be configured both in runtime and before the app start.

Solution

New resource PhysicsDebugRenderConfig with a bunch of bools for each group of render debug systems. By default, everything is enabled.

Alternative solution is to cram everything into PhysicsGizmos, but I think it's big enough already ?

Testing

I tested this with cargo run --example move_and_slide_3d --features use-debug-plugin and toggling colliders rendering:

index 113216a..f4db8db 100644
--- a/crates/examples_common_3d/src/lib.rs
+++ b/crates/examples_common_3d/src/lib.rs
@@ -44,6 +44,16 @@ impl Plugin for ExampleCommonPlugin {
         if !app.is_plugin_added::<PhysicsDebugPlugin>() {
             app.add_plugins(PhysicsDebugPlugin);
         }
+
+        app.add_systems(
+            Update,
+            (
+                (|mut r: ResMut<PhysicsDebugRenderConfig>| {
+                    r.enable_colliders = !r.enable_colliders
+                })
+                    .run_if(input_just_pressed(KeyCode::KeyC)),
+            ),
+        );
     }
 }