Feature: gitlab service widget (#4317)

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src/widgets/gitlab/widget.js

@@ -0,0 +1,13 @@
+import credentialedProxyHandler from "utils/proxy/handlers/credentialed";
+
+const widget = {
+  api: "{url}/api/v4/{endpoint}",
+  proxyHandler: credentialedProxyHandler,
+  mappings: {
+    counts: {
+      endpoint: "users/{user_id}/associations_count",
+    },
+  },
+};
+
+export default widget;