[RF] AquaMai configuration refactor (#82)

更新了配置文件格式，原有的配置文件将被自动无缝迁移，详情请见新的配置文件中的注释（例外：`SlideJudgeTweak` 不再默认启用）
旧配置文件将被重命名备份，如果更新到此版本遇到 Bug 请联系我们

Updated configuration file schema. The old config file will be migrated automatically and seamlessly. See the comments in the new configuration file for details. (Except for `SlideJudgeTweak` is no longer enabled by default)
Your old configuration file will be renamed as a backup. If you encounter any bug with this version, please contact us.

AquaMai/AquaMai.Mods/General.cs

@@ -0,0 +1,42 @@
+using AquaMai.Config.Attributes;
+
+namespace AquaMai.Mods;
+
+// This class is for settings only. Don't patch anything here.
+
+[ConfigSection(
+    en: "AquaMai's general settings.",
+    zh: "AquaMai 的通用设置",
+    alwaysEnabled: true)]
+public class General
+{
+    [ConfigEntry(
+        en: """
+            Language for mod UI (en and zh supported).
+            If empty, the system language will be used.
+            The config file will also be saved in this language.
+            """,
+        zh: """
+            Mod 界面的语言，支持 en 和 zh
+            如果为空，将使用系统语言
+            配置文件也将以此语言保存
+            """,
+        specialConfigEntry: SpecialConfigEntry.Locale)]
+    public static readonly string locale = "";
+}
+
+// Please add/remove corresponding entries in SetionNameOrder enum when adding/removing sections.
+public enum SetionNameOrder
+{
+    DeprecationWarning,
+    General,
+    Fix,
+    GameSystem_Assets,
+    GameSystem,
+    GameSettings,
+    Tweaks,
+    Tweaks_TimeSaving,
+    UX,
+    Utils,
+    Fancy
+}