re-added .xpex and .xpexl commands as there was no way to exclude users and roles from the xp system anymore

src/EllieBot/Db/Models/xp/XpExcludedItem.cs

@@ -0,0 +1,31 @@
+using System.ComponentModel.DataAnnotations;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace EllieBot.Db.Models;
+
+public class XpExcludedItem
+{
+    [Key]
+    public int Id { get; set; }
+
+    public ulong GuildId { get; set; }
+
+    public XpExcludedItemType ItemType { get; set; }
+    public ulong ItemId { get; set; }
+}
+
+public sealed class XpExclusionEntityConfig : IEntityTypeConfiguration<XpExcludedItem>
+{
+    public void Configure(EntityTypeBuilder<XpExcludedItem> builder)
+    {
+        builder.HasIndex(x => x.GuildId);
+
+        builder.HasAlternateKey(x => new
+        {
+            x.GuildId,
+            x.ItemType,
+            x.ItemId
+        });
+    }
+}