feat(gx): add setter for screen layer rect

src/gx/Screen.cpp

@@ -208,6 +208,10 @@ void ScrnLayerCreate(const RECTF* rect, float zOrder, uint32_t flags, void* para
     *layerPtr = HandleCreate(layer);
 }
 
+void ScrnLayerSetRect(HLAYER layer, const RECTF* rect) {
+    static_cast<CILayer*>(HandleDereference(layer))->rect = *rect;
+}
+
 void ScrnSetStockFont(SCRNSTOCK stockID, const char* fontTexturePath) {
     if (s_stockObjects[stockID]) {
         HandleClose(s_stockObjects[stockID]);

src/gx/Screen.hpp

@@ -44,6 +44,8 @@ void ScrnInitialize(int32_t a1);
 
 void ScrnLayerCreate(const RECTF* rect, float zOrder, uint32_t flags, void* param, void (*paintFunc)(void*, const RECTF*, const RECTF*, float), HLAYER* layerPtr);
 
+void ScrnLayerSetRect(HLAYER layer, const RECTF* rect);
+
 void ScrnSetStockFont(SCRNSTOCK stockID, const char* fontTexturePath);
 
 #endif