chore: checkpoint before Python removal

vendor/schemars/tests/nonzero_ints.rs

@@ -0,0 +1,17 @@
+mod util;
+use schemars::JsonSchema;
+use util::*;
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+struct MyStruct {
+    unsigned: u32,
+    nonzero_unsigned: std::num::NonZeroU32,
+    signed: i32,
+    nonzero_signed: std::num::NonZeroI32,
+}
+
+#[test]
+fn nonzero_ints() -> TestResult {
+    test_default_generated_schema::<MyStruct>("nonzero_ints")
+}