Use msaa antialiasing

src/Renderer.zig

@@ -10,6 +10,7 @@ const max_objects: usize = 16384;
 const quadSize: usize = 9 * 6;
 
 pub fn init() !Self {
+    rl.ConfigFlag.msaa_4x_hint.set();
     rl.initWindow(1280, 720, "USG", 120);
 
     return Self{};