godot-core: builtin: reimplement Rect2i to reduce need of inner usage

Author: yannick-was-taken

godot-core/src/builtin/mod.rs

@@ -212,7 +212,7 @@ mod real_mod {
     /// A 4-dimensional vector from [`glam`]. Using a floating-point format compatible with [`real`].
     pub type RVec4 = glam::Vec4;
 
-    /// A 2x2 column-major matrix from [`glam`]. Using a floating-point format compatible with [`real`].  
+    /// A 2x2 column-major matrix from [`glam`]. Using a floating-point format compatible with [`real`].
     pub type RMat2 = glam::Mat2;
     /// A 3x3 column-major matrix from [`glam`]. Using a floating-point format compatible with [`real`].
     pub type RMat3 = glam::Mat3;
@@ -279,7 +279,7 @@ mod real_mod {
     /// A 4-dimensional vector from [`glam`]. Using a floating-point format compatible with [`real`].
     pub type RVec4 = glam::DVec4;
 
-    /// A 2x2 column-major matrix from [`glam`]. Using a floating-point format compatible with [`real`].  
+    /// A 2x2 column-major matrix from [`glam`]. Using a floating-point format compatible with [`real`].
     pub type RMat2 = glam::DMat2;
     /// A 3x3 column-major matrix from [`glam`]. Using a floating-point format compatible with [`real`].
     pub type RMat3 = glam::DMat3;
@@ -330,6 +330,7 @@ macro_rules! real {
 /// The side of a [`Rect2`] or [`Rect2i`].
 ///
 /// _Godot equivalent: `@GlobalScope.Side`_
+#[derive(Copy, Clone)]
 #[repr(C)]
 pub enum RectSide {
     Left = 0,