Invoke on collision enter + start of attach child colliders to rigidbody

+ Changed default Namespace of ScriptCore to GlitchyEngine
+ Implicit Casts float2 <-> b2Vec2
+ Entity constructor internal
+ Renamed RigidBody2D to Rigidbody2D (notice the B)
+ Basic Debug Draw actual 2D Colliders
+ Added Entity::GetParentWithComponent

ScriptCore/Physics/Collision2D.cs

@@ -0,0 +1,35 @@
+using System.Runtime.InteropServices;
+using GlitchyEngine.Core;
+
+namespace GlitchyEngine.Physics;
+
+[StructLayout(LayoutKind.Sequential, Pack=1)]
+public struct Collision2D
+{
+    private UUID _entity;
+    private UUID _otherEntity;
+
+    private UUID _rigidbody;
+    private UUID _otherRigidbody;
+
+    /// <summary>
+    /// Gets the Entity whose Collider takes part in the collision.
+    /// This entity is either the entity of the script instance receiving the event or a child of it.
+    /// </summary>
+    public Entity Entity => new(_entity);
+    /// <summary>
+    /// Gets the other Entity whose collider takes part in the collision.
+    /// </summary>
+    public Entity OtherEntity => new(_otherEntity);
+
+    /// <summary>
+    /// Gets the rigidbody whose Collider takes part in the collision.
+    /// This Rigidbody is either a component of the entity whose script instance received the event or a parent of it.
+    /// </summary>
+    public Rigidbody2D Rigidbody => new() { Entity = Entity };
+
+    /// <summary>
+    /// Gets the other rigidbody whose Collider takes part in the collision.
+    /// </summary>
+    public Rigidbody2D OtherRigidbody => new() { Entity = OtherEntity };
+}