Changed cert-manager overview tabs to be proper routes

frontend/src/pages/cert-manager/CertificateAuthoritiesPage/route.tsx

@@ -0,0 +1,19 @@
+import { createFileRoute } from "@tanstack/react-router";
+
+import { CertificatesPage } from "./CertificatesPage";
+
+export const Route = createFileRoute(
+  "/_authenticate/_inject-org-details/_org-layout/cert-manager/$projectId/_cert-manager-layout/certificate-authorities"
+)({
+  component: CertificatesPage,
+  beforeLoad: ({ context }) => {
+    return {
+      breadcrumbs: [
+        ...context.breadcrumbs,
+        {
+          label: "Certificate Authorities"
+        }
+      ]
+    };
+  }
+});