Added missing items to overridableComponents

Signed-off-by: Andre Wanlin <awanlin@spotify.com>

plugins/search-react/src/components/HighlightedSearchResultText/HighlightedSearchResultText.tsx

@@ -17,6 +17,9 @@
 import React, { useMemo } from 'react';
 import { makeStyles } from '@material-ui/core/styles';
 
+/** @public */
+export type HighlightedSearchResultTextClassKey = 'highlight';
+
 const useStyles = makeStyles(
   () => ({
     highlight: {},

plugins/search-react/src/overridableComponents.ts

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2021 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 { Overrides } from '@material-ui/core/styles/overrides';
+import { StyleRules } from '@material-ui/core/styles/withStyles';
+import { HighlightedSearchResultTextClassKey } from './components';
+
+/** @public */
+export type CatalogReactComponentsNameToClassKey = {
+  BackstageHighlightedSearchResultText: HighlightedSearchResultTextClassKey;
+};
+
+/** @public */
+export type BackstageOverrides = Overrides & {
+  [Name in keyof CatalogReactComponentsNameToClassKey]?: Partial<
+    StyleRules<CatalogReactComponentsNameToClassKey[Name]>
+  >;
+};
+
+declare module '@backstage/theme' {
+  interface OverrideComponentNameToClassKeys
+    extends CatalogReactComponentsNameToClassKey {}
+}