Add "ZoneSettings" extensions

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

@@ -0,0 +1,35 @@
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	/// <summary>
+	/// Development Mode temporarily allows you to enter development mode for your
+	/// websites if you need to make changes to your site.This will bypass Cloudflare's
+	/// accelerated cache and slow down your site, but is useful if you are making
+	/// changes to cacheable content (like images, css, or JavaScript) and would like to
+	/// see those changes right away. Once entered, development mode will last for 3
+	/// hours and then automatically toggle off.
+	/// </summary>
+	public class DevelopmentMode : ZoneSettingBase
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="DevelopmentMode"/> class.
+		/// </summary>
+		public DevelopmentMode()
+		{
+			Id = ZoneSettingId.DevelopmentMode;
+		}
+
+		/// <summary>
+		/// Current state of the zone setting.
+		/// </summary>
+		[JsonProperty("value")]
+		public OnOffState Value { get; set; }
+
+		/// <summary>
+		/// The interval (in seconds) from when development mode expires (positive integer)
+		/// or last expired (negative integer) for the domain.
+		/// If development mode has never been enabled, this value is zero.
+		/// </summary>
+		[JsonProperty("time_remaining")]
+		public int? TimeRemaining { get; set; }
+	}
+}