comma backend: add missing `SetGamepadVibration` (#5)

src/platforms/rcore_comma.c

@@ -572,6 +572,10 @@ int SetGamepadMappings(const char *mappings) {
   return 0;
 }
 
+void SetGamepadVibration(int gamepad, float leftMotor, float rightMotor, float duration) {
+  TRACELOG(LOG_WARNING, "GamepadSetVibration() not implemented on target platform");
+}
+
 // Set mouse position XY
 void SetMousePosition(int x, int y) {
   CORE.Input.Mouse.currentPosition = (Vector2){ (float)x, (float)y };