Add CMS module

Static content pages (CmsPage) manageable from a new Filament resource and
readable via a public API endpoint. Wired into the admin panel with its own
CmsPlugin and "CMS" navigation group.

app-modules/cms/tests/Feature/CmsReadApiTest.php

@@ -0,0 +1,37 @@
+<?php
+
+use Modules\Cms\Models\CmsPage;
+
+test('lists active cms pages', function () {
+    $active = CmsPage::factory()->create(['is_active' => true]);
+    CmsPage::factory()->create(['is_active' => false]);
+
+    $this->getJson('/api/v1/cms-pages')
+        ->assertSuccessful()
+        ->assertJsonCount(1, 'data')
+        ->assertJsonFragment(['id' => $active->id]);
+});
+
+test('does not require authentication', function () {
+    CmsPage::factory()->create(['is_active' => true]);
+
+    $this->getJson('/api/v1/cms-pages')->assertSuccessful();
+});
+
+test('shows an active cms page by its page slug', function () {
+    $page = CmsPage::factory()->create(['page' => 'miniapp_faq', 'is_active' => true]);
+
+    $this->getJson('/api/v1/cms-pages/miniapp_faq')
+        ->assertSuccessful()
+        ->assertJsonFragment(['id' => $page->id, 'page' => 'miniapp_faq']);
+});
+
+test('returns not found for an inactive page', function () {
+    CmsPage::factory()->create(['page' => 'miniapp_faq', 'is_active' => false]);
+
+    $this->getJson('/api/v1/cms-pages/miniapp_faq')->assertNotFound();
+});
+
+test('returns not found for an unknown page slug', function () {
+    $this->getJson('/api/v1/cms-pages/unknown-page')->assertNotFound();
+});