refactor: update target os settings for cross-platform compatibility

- change the target os check from `macos` to `linux`
- add a block for `windows` target os and include all `wgpu` backends

src/offscreen_renderer.rs

@@ -60,10 +60,15 @@ impl OffscreenRenderer {
             wgpu::Backends::METAL
         }
 
-        #[cfg(not(target_os = "macos"))]
+        #[cfg(target_os = "linux")]
         {
             wgpu::Backends::VULKAN
         }
+
+        #[cfg(target_os = "windows")]
+        {
+            wgpu::Backends::all()
+        }
     }
 
     pub async fn draw(&mut self, scene: &Scene) -> ImageBuffer<Rgba<u8>, Vec<u8>> {