chore: checkpoint before Python removal

vendor/wasip2/src/ext/mod.rs

@@ -0,0 +1,8 @@
+#[cfg(feature = "std")]
+mod std;
+
+impl core::fmt::Display for crate::io::error::Error {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.write_str(&self.to_debug_string())
+    }
+}