feat: add abstract classes for controllers, facades, and service providers with unit tests

tests/Facades/AbstractFacade.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Siteworxpro\Tests\Facades;
+
+use Siteworxpro\App\Services\Facade;
+use Siteworxpro\Tests\Unit;
+
+abstract class AbstractFacade extends Unit
+{
+    abstract protected function getFacadeClass(): string;
+    abstract protected function getConcrete(): string;
+
+    public function testFacadeAccessor(): void
+    {
+        /** @var Facade | string $class */
+        $class = $this->getFacadeClass();
+
+        $this->assertTrue(
+            method_exists($class, 'getFacadeAccessor'),
+            sprintf('The class %s must implement the method getFacadeAccessor.', $class)
+        );
+
+        $facade = $class::getFacadeRoot();
+
+        $this->assertNotNull(
+            $facade,
+            sprintf('The facade %s is not properly initialized.', $this->getConcrete())
+        );
+    }
+}