test(phase22): add aggregate phase runner entrypoint

tests/phase22/index.test.cjs

@@ -0,0 +1,15 @@
+const runCoreTokenTests = require("./core-token-behaviour.test.cjs");
+
+const run = async () => {
+    await runCoreTokenTests();
+    console.log("Phase 22 combined suite passed.");
+};
+
+if (require.main === module) {
+    run().catch((error) => {
+        console.error(error);
+        process.exit(1);
+    });
+}
+
+module.exports = run;