Add "ZoneSettings" extensions

Extensions/Cloudflare.Zones/Enums/OnOffCustomState.cs

@@ -0,0 +1,31 @@
+using System.Runtime.Serialization;
+using Newtonsoft.Json.Converters;
+
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	/// <summary>
+	/// Value states on/off/custom.
+	/// <see href="https://github.com/cloudflare/cloudflare-typescript/blob/v4.4.1/src/resources/zones/settings.ts#L591">Source</see>
+	/// </summary>
+	[JsonConverter(typeof(StringEnumConverter))]
+	public enum OnOffCustomState
+	{
+		/// <summary>
+		/// On state.
+		/// </summary>
+		[EnumMember(Value = "on")]
+		On = 1,
+
+		/// <summary>
+		/// Off state.
+		/// </summary>
+		[EnumMember(Value = "off")]
+		Off = 2,
+
+		/// <summary>
+		/// Custom state.
+		/// </summary>
+		[EnumMember(Value = "custom")]
+		Custom = 3
+	}
+}