feat: allow searching articles in omnisearch (#11558)

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/api/search.js

@@ -40,6 +40,15 @@ class SearchAPI extends ApiClient {
       },
     });
   }
+
+  articles({ q, page = 1 }) {
+    return axios.get(`${this.url}/articles`, {
+      params: {
+        q,
+        page: page,
+      },
+    });
+  }
 }
 
 export default new SearchAPI();