[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.Config/Reflection/SystemReflectionProvider.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using AquaMai.Config.Interfaces;
+
+namespace AquaMai.Config.Reflection;
+
+public class SystemReflectionProvider(Assembly assembly) : IReflectionProvider
+{
+    public class ReflectionField(FieldInfo field) : IReflectionField
+    {
+        public FieldInfo UnderlyingField { get; } = field;
+
+        public string Name => UnderlyingField.Name;
+        public Type FieldType => UnderlyingField.FieldType;
+        public T GetCustomAttribute<T>() where T : Attribute => UnderlyingField.GetCustomAttribute<T>();
+        public object GetValue(object obj) => UnderlyingField.GetValue(obj);
+        public void SetValue(object obj, object value) => UnderlyingField.SetValue(obj, value);
+    }
+
+    public class ReflectionType(Type type) : IReflectionType
+    {
+        public Type UnderlyingType { get; } = type;
+
+        public string FullName => UnderlyingType.FullName;
+        public string Namespace => UnderlyingType.Namespace;
+        public T GetCustomAttribute<T>() where T : Attribute => UnderlyingType.GetCustomAttribute<T>();
+        public IReflectionField[] GetFields(BindingFlags bindingAttr) => Array.ConvertAll(UnderlyingType.GetFields(bindingAttr), f => new ReflectionField(f));
+    }
+
+    public Assembly UnderlyingAssembly { get; } = assembly;
+
+    public IReflectionType[] GetTypes() => Array.ConvertAll(UnderlyingAssembly.GetTypes(), t => new ReflectionType(t));
+
+    public Dictionary<string, object> GetEnum(string enumName)
+    {
+        var enumType = UnderlyingAssembly.GetType(enumName);
+        if (enumType == null) return null;
+        var enumValues = Enum.GetValues(enumType);
+        var enumDict = new Dictionary<string, object>();
+        foreach (var enumValue in enumValues)
+        {
+            enumDict.Add(enumValue.ToString(), enumValue);
+        }
+        return enumDict;
+    }
+}