feat: GlobalMenu API

- GlobalMenu 작성용 DTO(MenuItem, MenuMulti, MenuSplit)
- d_setting에 GlobalMenu를 직접 작성 가능하도록 제공

hwe/sammo/API/Global/GetGlobalMenu.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace sammo\API\Global;
+
+use LDTO\DTO;
+use sammo\APICacheResult;
+use sammo\BaseAPI;
+use sammo\GlobalMenu;
+use sammo\Session;
+
+class GetGlobalMenu extends BaseAPI
+{
+  public function getRequiredSessionMode(): int
+  {
+    return self::NO_SESSION;
+  }
+  function validateArgs(): ?string
+  {
+    return null;
+  }
+
+  function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  {
+    if ($reqEtag !== null) {
+      $version = GlobalMenu::version;
+      if ($reqEtag == "v{$version}") {
+        return null;
+      }
+    }
+    return [
+      'result' => true,
+      'menu' => array_map(function (DTO $dto) {
+        return $dto->toArray();
+      }, GlobalMenu::getMenu()),
+    ];
+  }
+  public function tryCache(): ?APICacheResult
+  {
+    $version = GlobalMenu::version;
+    return new APICacheResult(
+      null,
+      "v{$version}",
+      60 * 60 * 6,
+      true
+    );
+  }
+}