feat: add custom webhook notification support

Add basic infrastructure for custom webhook notifications:
- Create webhook_notification_settings table with event toggles
- Add WebhookNotificationSettings model with encrypted URL
- Integrate webhook settings into Team model and HasNotificationSettings trait
- Create Livewire component and Blade view for webhook configuration
- Add webhook navigation route and UI

This provides the foundation for sending webhook notifications to custom HTTP/HTTPS endpoints when events occur in Coolify.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

database/migrations/2025_10_10_120000_create_webhook_notification_settings_table.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('webhook_notification_settings', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('team_id')->constrained()->cascadeOnDelete();
+
+            $table->boolean('webhook_enabled')->default(false);
+            $table->text('webhook_url')->nullable();
+
+            $table->boolean('deployment_success_webhook_notifications')->default(false);
+            $table->boolean('deployment_failure_webhook_notifications')->default(true);
+            $table->boolean('status_change_webhook_notifications')->default(false);
+            $table->boolean('backup_success_webhook_notifications')->default(false);
+            $table->boolean('backup_failure_webhook_notifications')->default(true);
+            $table->boolean('scheduled_task_success_webhook_notifications')->default(false);
+            $table->boolean('scheduled_task_failure_webhook_notifications')->default(true);
+            $table->boolean('docker_cleanup_success_webhook_notifications')->default(false);
+            $table->boolean('docker_cleanup_failure_webhook_notifications')->default(true);
+            $table->boolean('server_disk_usage_webhook_notifications')->default(true);
+            $table->boolean('server_reachable_webhook_notifications')->default(false);
+            $table->boolean('server_unreachable_webhook_notifications')->default(true);
+
+            $table->unique(['team_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('webhook_notification_settings');
+    }
+};