update test plugin so its clear why it exists

Author: abdulahmad307

.github/scanner-plugins/temp-test-scan/index.js

@@ -0,0 +1,8 @@
+// - this exist as a test to verify that loading plugins
+//   via js files still works and there are no regressions
+
+export default async function TestJsFilePluginLoad({ page, addFinding } = {}) {
+  console.log('testing plugin load using js file')
+}
+
+export const name = 'test-js-file-plugin-load'