Added some Zone features

Extensions/Cloudflare.Zones/RegexPatterns.cs

@@ -0,0 +1,9 @@
+using System.Text.RegularExpressions;
+
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	internal static class RegexPatterns
+	{
+		public static readonly Regex ZoneName = new(@"^([a-zA-Z0-9][\-a-zA-Z0-9]*\.)+[\-a-zA-Z0-9]{2,20}$", RegexOptions.Compiled);
+	}
+}