chore(event): consolidate window and input functions

src/event/linux/Input.cpp

@@ -1,5 +1,9 @@
 #include "event/Input.hpp"
 
+int32_t OsGuiProcessMessage(void* message) {
+    return 0;
+}
+
 int32_t OsInputGet(OSINPUT* id, int32_t* param0, int32_t* param1, int32_t* param2, int32_t* param3) {
     // TODO
     return 0;
@@ -8,3 +12,7 @@ int32_t OsInputGet(OSINPUT* id, int32_t* param0, int32_t* param1, int32_t* param
 void OsInputSetMouseMode(OS_MOUSE_MODE mode) {
     // TODO
 }
+
+int32_t OsWindowProc(void* window, uint32_t message, uintptr_t wparam, intptr_t lparam) {
+    return 0;
+}

src/event/linux/Window.cpp

@@ -1,9 +0,0 @@
-#include "event/Window.hpp"
-
-int32_t OsGuiProcessMessage(void* message) {
-    return 0;
-}
-
-int32_t OsWindowProc(void* window, uint32_t message, uintptr_t wparam, intptr_t lparam) {
-    return 0;
-}