Add "ZoneSettings" extensions

Extensions/Cloudflare.Zones/Models/Settings/CNAMEFlattening.cs

@@ -0,0 +1,24 @@
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	/// <summary>
+	/// How to flatten the cname destination.
+	/// </summary>
+	[Obsolete("Please use the DNS Settings route instead.")]
+	public class CNAMEFlattening : ZoneSettingBase
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="CNAMEFlattening"/> class.
+		/// </summary>
+		public CNAMEFlattening()
+		{
+			Id = ZoneSettingId.CNAMEFlattening;
+		}
+
+		/// <summary>
+		/// Current value of the zone setting.
+		/// </summary>
+		[Obsolete("Please use the DNS Settings route instead.")]
+		[JsonProperty("value")]
+		public string? Value { get; set; }
+	}
+}