Improved how stickeradd works. Optional parameters will be a hidden feature as it's hard to explain. Tags are now also optional.

src/NadekoBot/Modules/Utility/Utility.cs

@@ -416,6 +416,7 @@ public partial class Utility : NadekoModule
         {
             name ??= ss.Name;
             description = ss.Description;
+            tags = tags is null or { Length: 0 } ? ss.Tags.ToArray() : tags;
             format = FormatToExtension(ss.Format);
 
             using var http = _httpFactory.CreateClient();
@@ -461,6 +462,9 @@ public partial class Utility : NadekoModule
         
         try
         {
+            if (tags.Length == 0)
+                tags = new[] { name };
+            
             await ctx.Guild.CreateStickerAsync(name,
                 string.IsNullOrWhiteSpace(description) ? "Missing description" : description,
                 tags,