fix: revert removing routeRef

Signed-off-by: Isaiah Thiessen <isaiah.thiessen@telus.com>

plugins/dynatrace/src/plugin.ts

@@ -25,7 +25,9 @@ import {
 import { Entity } from '@backstage/catalog-model';
 import { DYNATRACE_ID_ANNOTATION } from './constants';
 
-// @public
+import { rootRouteRef } from './routes';
+
+// @public (undocumented)
 export const dynatracePlugin = createPlugin({
   id: 'dynatrace',
   apis: [
@@ -44,11 +46,11 @@ export const dynatracePlugin = createPlugin({
   ],
 });
 
-// @public
+// @public (undocumented)
 export const isDynatraceAvailable = (entity: Entity) =>
   Boolean(entity.metadata.annotations?.[DYNATRACE_ID_ANNOTATION]);
 
-// @public
+// @public (undocumented)
 export const DynatraceTab = dynatracePlugin.provide(
   createRoutableExtension({
     name: 'DynatraceTab',

plugins/dynatrace/src/routes.ts

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2022 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { createRouteRef } from '@backstage/core-plugin-api';
+
+export const rootRouteRef = createRouteRef({
+  id: 'dynatrace',
+});