change: gambling commands now show amount bet. Slightly changed the layout. Updated some gambling strings

add: added .btr excl

src/NadekoBot/Db/Models/SarGroup.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace NadekoBot.Db.Models;
+
+public sealed class SarGroup
+{
+    [Key]
+    public int Id { get; set; }
+
+    public int GroupNumber { get; set; }
+    public ulong GuildId { get; set; }
+    public ulong? RoleReq { get; set; }
+    public ICollection<Sar> Roles { get; set; } = [];
+    public bool IsExclusive { get; set; }
+    
+    [MaxLength(100)]
+    public string? Name { get; set; }
+}