Added extensions for tags

src/Disqord.Core/Entities/Local/Guild/Extensions/LocalChannelTagExtensions.cs

@@ -0,0 +1,35 @@
+using System.ComponentModel;
+
+namespace Disqord;
+
+[EditorBrowsable(EditorBrowsableState.Never)]
+public static class LocalChannelTagExtensions
+{
+    public static TChannelTag WithId<TChannelTag>(this TChannelTag channelTag, Snowflake id)
+        where TChannelTag : LocalChannelTag
+    {
+        channelTag.Id = id;
+        return channelTag;
+    }
+
+    public static TChannelTag WithName<TChannelTag>(this TChannelTag channelTag, string name)
+        where TChannelTag : LocalChannelTag
+    {
+        channelTag.Name = name;
+        return channelTag;
+    }
+
+    public static TChannelTag WithIsModerated<TChannelTag>(this TChannelTag channelTag, bool isModerated = true)
+        where TChannelTag : LocalChannelTag
+    {
+        channelTag.IsModerated = isModerated;
+        return channelTag;
+    }
+
+    public static TChannelTag WithEmoji<TChannelTag>(this TChannelTag channelTag, LocalEmoji emoji)
+        where TChannelTag : LocalChannelTag
+    {
+        channelTag.Emoji = emoji;
+        return channelTag;
+    }
+}