Add first pass of the web interface: Sites index + detail, via Livewire

Home page is now a Livewire-powered, searchable/paginated Site list
(search by domain) instead of the stock Laravel welcome page. Clicking
a site goes to a plain controller-rendered detail page listing its
pages. Shared layout at resources/views/components/layouts/app.blade.php.

app/Livewire/Sites/Index.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Livewire\Sites;
+
+use App\Models\Site;
+use Illuminate\Contracts\View\View;
+use Livewire\Attributes\Layout;
+use Livewire\Attributes\Url;
+use Livewire\Component;
+use Livewire\WithPagination;
+
+#[Layout('components.layouts.app')]
+class Index extends Component
+{
+    use WithPagination;
+
+    #[Url(as: 'q', history: true)]
+    public string $search = '';
+
+    public function updatingSearch(): void
+    {
+        $this->resetPage();
+    }
+
+    public function render(): View
+    {
+        $sites = Site::query()
+            ->withCount('pages')
+            ->when(
+                $this->search !== '',
+                fn ($query) => $query->where('domain', 'like', '%'.$this->search.'%')
+            )
+            ->orderBy('domain')
+            ->paginate(25);
+
+        return view('livewire.sites.index', ['sites' => $sites]);
+    }
+}