fix: Eq for SwapchainFrame, this should be more rigorous

will be more rigorous if `index` is monotonically increasing instead of modulo
of in-flight-frames

crates/renderer/src/lib.rs

@@ -584,6 +584,13 @@ pub struct SwapchainFrame {
     pub release: vk::Semaphore,
 }
 
+impl Eq for SwapchainFrame {}
+impl PartialEq for SwapchainFrame {
+    fn eq(&self, other: &Self) -> bool {
+        self.index == other.index && self.image == other.image
+    }
+}
+
 impl SwapchainFrame {
     fn present(self, wait: Option<vk::Semaphore>) -> Result<()> {
         self.swapchain.clone().present(self, wait)