feat: Vue3로 새롭게 작성한 메인 페이지 (#229)

- v_front.php
- API 추가
  - General/GetFrontInfo
  - Global/GetGlobalMenu
- DTO 추가
  - MenuItem, MenuMulti, MenuSplit
- 글로벌 메뉴 출력 방식 변경
  - d_setting/GlobalMenu.php

Reviewed-on: https://storage.hided.net/gitea/devsam/core/pulls/229

hwe/sammo/DTO/MenuItem.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace sammo\DTO;
+
+use LDTO\Attr\NullIsUndefined;
+use LDTO\DTO;
+
+class MenuItem extends DTO{
+  public readonly string $type;
+
+  public function __construct(
+    public readonly string $name,
+    public readonly string $url,
+
+    #[NullIsUndefined]
+    public ?string $icon = null,
+    #[NullIsUndefined]
+    public ?bool $newTab = false,
+    #[NullIsUndefined]
+    public ?string $condHighlightVar = null,
+    #[NullIsUndefined]
+    public ?string $condShowVar = null,
+  ){
+    $this->type = 'item';
+  }
+}