feat(techdocs): filter fetched entity kinds and fields

Signed-off-by: Phil Kuang <pkuang@factset.com>

.changeset/smooth-planes-mate.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Filter fetched entity fields to optimize loading techdocs list

plugins/techdocs/src/home/components/TechDocsCustomHome.tsx

@@ -124,7 +124,9 @@ export const TechDocsCustomHome = ({
   const configApi: ConfigApi = useApi(configApiRef);
 
   const { value: entities, loading, error } = useAsync(async () => {
-    const response = await catalogApi.getEntities();
+    const response = await catalogApi.getEntities({
+      fields: ['apiVersion', 'kind', 'metadata', 'spec.owner', 'spec.type'],
+    });
     return response.items.filter((entity: Entity) => {
       return !!entity.metadata.annotations?.['backstage.io/techdocs-ref'];
     });