[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/Fancy/DemoMaster.cs

@@ -0,0 +1,34 @@
+using AquaMai.Config.Attributes;
+using DB;
+using HarmonyLib;
+using MAI2.Util;
+using Manager;
+using Process;
+
+namespace AquaMai.Mods.Fancy;
+
+[ConfigSection(
+    en: "Play \"Master\" difficulty on Demo screen.",
+    zh: "在闲置时的演示画面上播放紫谱而不是绿谱")]
+public class DemoMaster
+{
+    [HarmonyPostfix]
+    [HarmonyPatch(typeof(AdvDemoProcess), "OnStart")]
+    public static void AdvDemoProcessPostStart()
+    {
+        for (int i = 0; i < 2; i++)
+        {
+            var userOption = Singleton<GamePlayManager>.Instance.GetGameScore(i).UserOption;
+            userOption.NoteSpeed = OptionNotespeedID.Speed6_5;
+            userOption.TouchSpeed = OptionTouchspeedID.Speed7_0;
+        }
+    }
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(GamePlayManager), "InitializeAdvertise")]
+    public static void PreInitializeAdvertise()
+    {
+        GameManager.SelectDifficultyID[0] = 3;
+        GameManager.SelectDifficultyID[1] = 3;
+    }
+}