chore: checkpoint before Python removal

vendor/schemars/examples/enum_repr.rs

@@ -0,0 +1,15 @@
+use schemars::{schema_for, JsonSchema_repr};
+
+#[derive(JsonSchema_repr)]
+#[repr(u8)]
+enum SmallPrime {
+    Two = 2,
+    Three = 3,
+    Five = 5,
+    Seven = 7,
+}
+
+fn main() {
+    let schema = schema_for!(SmallPrime);
+    println!("{}", serde_json::to_string_pretty(&schema).unwrap());
+}