chore(v5): archive V5 implementation and remove runtime integration

Move V5 source, migrations, UI, scripts, and tests into documentation, then remove V5 routes, models, jobs, configuration, dependencies, and application hooks.

tests/Unit/MobileInputZoomPreventionTest.php

@@ -13,16 +13,10 @@ it('uses at least sixteen pixel form controls on mobile to prevent input focus z
         ->and($css)->toContain(':root textarea,')
         ->and($css)->toContain(':root select')
         ->and($css)->toContain('font-size: 16px !important;');
-})->with([
-    'current interface' => 'resources/css/app.css',
-    'v5 interface' => 'resources/css/v5/app.css',
-]);
+})->with(['resources/css/app.css']);
 
 it('keeps user zoom enabled in the viewport meta tags', function () {
-    $layouts = [
-        'resources/views/layouts/base.blade.php',
-        'resources/views/v5/app.blade.php',
-    ];
+    $layouts = ['resources/views/layouts/base.blade.php'];
 
     foreach ($layouts as $layout) {
         expect(file_get_contents(dirname(__DIR__, 2).'/'.$layout))