feat: remove DNS and Domains from layout, add DNS and Domains content components

- Removed DNS and Domains entries from the layout navigation.
- Added DnsContentComponent for managing DNS records with Cloudflare.
- Added DomainsContentComponent for managing domains and SSL certificates.
- Introduced TabsComponent and TabComponent for tab navigation.
- Updated index.ts to export new TabsComponent and TabComponent.

ui/src/app/app.routes.ts

@@ -54,17 +54,17 @@ export const routes: Routes = [
         ],
       },
       {
-        path: 'domains',
+        path: 'network',
         children: [
           {
             path: '',
             loadComponent: () =>
-              import('./features/domains/domains.component').then(
-                (m) => m.DomainsComponent
+              import('./features/network/network.component').then(
+                (m) => m.NetworkComponent
               ),
           },
           {
-            path: ':domain',
+            path: 'domains/:domain',
             loadComponent: () =>
               import('./features/domains/domain-detail.component').then(
                 (m) => m.DomainDetailComponent
@@ -72,18 +72,6 @@ export const routes: Routes = [
           },
         ],
       },
-      {
-        path: 'dns',
-        loadComponent: () =>
-          import('./features/dns/dns.component').then((m) => m.DnsComponent),
-      },
-      {
-        path: 'network',
-        loadComponent: () =>
-          import('./features/network/network.component').then(
-            (m) => m.NetworkComponent
-          ),
-      },
       {
         path: 'registries',
         loadComponent: () =>