Icu 5245 add workers tab to navigation and initial overview (#1229)

* feat: 🎸 Add initial workers UI navigation page

✅ Closes: ICU-5245

addons/api/addon/abilities/worker.js

@@ -0,0 +1,15 @@
+import ModelAbility from './model';
+
+/**
+ * Provides abilities for workers.
+ */
+export default class WorkerAbility extends ModelAbility {
+  // =permissions
+
+  /**
+   * @type {boolean}
+   */
+  get canCreateWorkerLed() {
+    return this.hasAuthorizedCollectionAction('create:worker-led');
+  }
+}