[core] Massive setting system update

- Get rid of attribute crap. Now only interface is required
- Rename canUse to isAdmin in `Bot.IsUserAdminAsync` to match the actual meaning of variable
- Made `AnswerQuery` reusable by moving it from ContentStore to Core's CommonHandler
- Chat Settings edit frontend (inline keyboard)
- Rename NsfwOption to AllowNsfw and move it to ContentStore module
- Remove option backend testing commands
- Add KarmaMode option as an example of Select option type

Core/Options/IOption.cs

@@ -1,10 +1,20 @@
-using System.Runtime.Serialization;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Kruzya.TelegramBot.Core.Options;
 
-public interface IOption<TValue>
+public interface IOption
 {
+    public string OptionId { get; }
+    public string OptionName { get; }
+    public OptionType OptionType { get; }
+    public List<SelectChoice> ChoiceList { get; }
+}
+
+public interface IOption<TValue> : IOption
+{
+    public TValue DefaultValue { get; }
+
     public Task<TValue> GetValueAsync(long chatId);
     public Task SetValueAsync(long chatId, TValue value);
 }