New route to retrieve gradation status

ui/src/lib/repositories.js

@@ -88,6 +88,18 @@ export class WorkRepository {
     }
   }
 
+  async gradationStatus() {
+    const res = await fetch(this.id_work?`api/works/${this.id_work}/repositories/${this.id}/gradation_status`:`api/repositories/${this.id}/gradation_status`, {
+      method: 'GET',
+      headers: {'Accept': 'application/json'},
+    });
+    if (res.status == 200) {
+      return await res.json();
+    } else {
+      throw new Error((await res.json()).errmsg);
+    }
+  }
+
   async save(user) {
     let url = this.id?`repositories/${this.id}`:'repositories';