Add webhook to required review checks, remove dead customer plugin controller

- Include webhook_installed in required approval checks (Plugin model,
  Filament admin, notifications, customer dashboard)
- Move webhook setup instructions into the review checks section
- Update best-practices docs: replace support email with support channel,
  add license/release/webhook requirements
- Delete dead code: CustomerPluginController, its form requests, and old
  customer/plugins Blade views (replaced by Livewire components)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: simonhamp

app/Filament/Resources/PluginResource.php

@@ -101,6 +101,10 @@ public static function form(Schema $schema): Schema
                                 ? '✅ '.($record->review_checks['release_version'] ?? '')
                                 : '❌ Missing'),
 
+                        Forms\Components\Placeholder::make('review_webhook')
+                            ->label('Webhook Configured (required)')
+                            ->content(fn (?Plugin $record) => $record?->webhook_installed ? '✅ Configured' : '❌ Not configured'),
+
                         Forms\Components\Placeholder::make('review_ios')
                             ->label('iOS Support')
                             ->content(fn (?Plugin $record) => ($record?->review_checks['supports_ios'] ?? false) ? '✅ Found' : '❌ Missing'),

app/Filament/Resources/PluginResource/Pages/EditPlugin.php

@@ -195,9 +195,12 @@ protected function getHeaderActions(): array
                             return;
                         }
 
+                        $webhookConfigured = $this->record->webhook_installed;
+
                         $lines = collect([
                             ['License file *', $checks['has_license_file']],
                             ['Release version *', $checks['has_release_version'] ? $checks['release_version'] : false],
+                            ['Webhook *', $webhookConfigured],
                             ['iOS support', $checks['supports_ios']],
                             ['Android support', $checks['supports_android']],
                             ['JS support', $checks['supports_js']],
@@ -221,13 +224,13 @@ protected function getHeaderActions(): array
                             'supports_ios', 'supports_android', 'supports_js',
                             'requires_mobile_sdk',
                             'has_ios_min_version', 'has_android_min_version',
-                        ])->filter()->count();
+                        ])->filter()->count() + ($webhookConfigured ? 1 : 0);
 
                         Notification::make()
-                            ->title("Review checks complete ({$passed}/8 passed)")
+                            ->title("Review checks complete ({$passed}/9 passed)")
                             ->body(new HtmlString($lines))
                             ->duration(15000)
-                            ->color($passed === 8 ? 'success' : 'warning')
+                            ->color($passed === 9 ? 'success' : 'warning')
                             ->send();
                     }),