Add "ZoneSettings" extensions

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

@@ -0,0 +1,26 @@
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	/// <summary>
+	/// When enabled, Cloudflare serves limited copies of web pages available from the
+	/// <see href="https://archive.org/web/">Internet Archive's Wayback Machine</see>
+	/// if your server is offline.
+	/// Refer to <see href="https://developers.cloudflare.com/cache/about/always-online">Always Online</see>
+	/// for more information.
+	/// </summary>
+	public class AlwaysOnline : ZoneSettingBase
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="AlwaysOnline"/> class.
+		/// </summary>
+		public AlwaysOnline()
+		{
+			Id = ZoneSettingId.AlwaysOnline;
+		}
+
+		/// <summary>
+		/// Current value of the zone setting.
+		/// </summary>
+		[JsonProperty("value")]
+		public OnOffState Value { get; set; }
+	}
+}