Patch - Improves code and UI for better engine stability - V14.5.30

Addresses minor issues across the engine to improve stability and UI.

- Updates ImGui window size for better rendering
- Adds macro for boolean returns (R_TRUE and R_FALSE)
- Adds missing includes and removes unused code
- Updates shader code to use the new macros and improve readability

enginecustom/src/inc/system/frustumclass.h

@@ -6,6 +6,7 @@
 // INCLUDES //
 //////////////
 #include <directxmath.h>
+#include "macro.h"
 using namespace DirectX;