Update demo app to show costs for service components

Signed-off-by: Kévin Gomez <contact@kevingomez.fr>

packages/app/src/components/catalog/EntityPage.tsx

@@ -153,6 +153,7 @@ import {
   TextSize,
   ReportIssue,
 } from '@backstage/plugin-techdocs-module-addons-contrib';
+import { EntityCostInsightsContent } from '@backstage/plugin-cost-insights';
 
 const customEntityFilterKind = ['Component', 'API', 'System'];
 
@@ -489,6 +490,10 @@ const serviceEntityPage = (
       <EntityTodoContent />
     </EntityLayout.Route>
 
+    <EntityLayout.Route path="/costs" title="Costs">
+      <EntityCostInsightsContent />
+    </EntityLayout.Route>
+
     <EntityLayout.Route
       path="/dynatrace"
       title="Dynatrace"