Added documentation, addd plugin to sample app

packages/app/package.json

@@ -19,7 +19,7 @@
     "@backstage/plugin-gitops-profiles": "^0.2.2",
     "@backstage/plugin-graphiql": "^0.2.2",
     "@backstage/plugin-jenkins": "^0.3.4",
-    "@backstage/plugin-kafka": "^0.1.1",
+    "@backstage/plugin-kafka": "^0.1.0",
     "@backstage/plugin-kubernetes": "^0.3.3",
     "@backstage/plugin-lighthouse": "^0.2.6",
     "@backstage/plugin-newrelic": "^0.2.2",

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

@@ -63,6 +63,7 @@ import {
   UserProfileCard,
 } from '@backstage/plugin-org';
 import { Router as SentryRouter } from '@backstage/plugin-sentry';
+import { Router as KafkaRouter } from '@backstage/plugin-kafka';
 import { EmbeddedDocsRouter as DocsRouter } from '@backstage/plugin-techdocs';
 import { Button, Grid } from '@material-ui/core';
 import {
@@ -243,6 +244,11 @@ const ServiceEntityPage = ({ entity }: { entity: Entity }) => (
       title="Code Insights"
       element={<GitHubInsightsRouter entity={entity} />}
     />
+    <EntityPageLayout.Content
+      path="/kafka/*"
+      title="Kafka"
+      element={<KafkaRouter entity={entity} />}
+    />
   </EntityPageLayout>
 );