feat(modules) : expose GET /api/modules and module registry

tests/Unit/Shared/Module/ModuleRegistryTest.php

@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Shared\Module;
+
+use App\Shared\Domain\Module\ModuleInterface;
+use App\Shared\Domain\Module\ModuleRegistry;
+use PHPUnit\Framework\TestCase;
+use stdClass;
+
+/**
+ * @internal
+ */
+final class ModuleRegistryTest extends TestCase
+{
+    public function testIdsExtractsDeclaredModuleIds(): void
+    {
+        $classes = [FakeAlphaModule::class, FakeBetaModule::class];
+
+        self::assertSame(['alpha', 'beta'], ModuleRegistry::ids($classes));
+    }
+
+    public function testIdsIgnoresClassesNotImplementingModuleInterface(): void
+    {
+        $classes = [FakeAlphaModule::class, stdClass::class];
+
+        self::assertSame(['alpha'], ModuleRegistry::ids($classes));
+    }
+
+    public function testIdsReturnsEmptyArrayForNoModules(): void
+    {
+        self::assertSame([], ModuleRegistry::ids([]));
+    }
+}
+
+final class FakeAlphaModule implements ModuleInterface
+{
+    public static function id(): string
+    {
+        return 'alpha';
+    }
+
+    public static function label(): string
+    {
+        return 'Alpha';
+    }
+
+    public static function isRequired(): bool
+    {
+        return false;
+    }
+
+    public static function permissions(): array
+    {
+        return [];
+    }
+}
+
+final class FakeBetaModule implements ModuleInterface
+{
+    public static function id(): string
+    {
+        return 'beta';
+    }
+
+    public static function label(): string
+    {
+        return 'Beta';
+    }
+
+    public static function isRequired(): bool
+    {
+        return true;
+    }
+
+    public static function permissions(): array
+    {
+        return [];
+    }
+}