chore: checkpoint before Python removal

vendor/zerocopy/benches/ref_from_bytes_dynamic_padding.rs

@@ -0,0 +1,7 @@
+#[path = "formats/coco_dynamic_padding.rs"]
+mod format;
+
+#[unsafe(no_mangle)]
+fn bench_ref_from_bytes_dynamic_padding(source: &[u8]) -> Option<&format::LocoPacket> {
+    zerocopy::FromBytes::ref_from_bytes(source).ok()
+}