[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/DeprecationWarning.cs

@@ -0,0 +1,29 @@
+using AquaMai.Config.Attributes;
+
+namespace AquaMai.Mods;
+
+[ConfigSection(
+    en: """
+        These options have been deprecated and no longer work in the current version.
+        Remove them to get rid of the warning message at startup.
+        """,
+    zh: """
+        这些配置项已经被废弃，在当前版本不再生效
+        删除它们以去除启动时的警告信息
+        """,
+    exampleHidden: true)]
+public class DeprecationWarning
+{
+    [ConfigEntry(hideWhenDefault: true)]
+    public static readonly bool v1_0_ModKeyMap_TestMode;
+
+    // Print friendly warning messages here.
+    // Please keep them up-to-date while refactoring the config.
+    public static void OnBeforeAllPatch()
+    {
+        if (v1_0_ModKeyMap_TestMode)
+        {
+            MelonLoader.MelonLogger.Warning("ModKeyMap.TestMode has been deprecated (> v1.0). Please use GameSystem.KeyMap.Test instead.");
+        }
+    }
+}