Added feature to enable and disable mappings (#1437)

* feat/1421 added feature to enable and disable mappings

* feat/1421 updated test constants to reflect 2 new admin endpoints /enable and /disable

* feat/1421 updated tests to fix flakyness - removed delay before assertion that is causing upstream connection from proxy to teardown prematurely before test ends

* feat/1421 addressing PR comments - Updated logic to represent IsDisable insted of IsEnabled

src/WireMock.Net.Abstractions/Admin/Mappings/MappingModel.cs

@@ -55,12 +55,17 @@ public class MappingModel
     /// In case the value is null state will not be changed.
     /// </summary>
     public string? SetStateTo { get; set; }
-    
+
     /// <summary>
     /// The number of times this match should be matched before the state will be changed to the specified one.
     /// </summary>
     public int? TimesInSameState { get; set; }
 
+    /// <summary>
+    /// Value to determine if the mapping is disabled. Defaults to <c>null</c> (not disabled).
+    /// </summary>
+    public bool? IsDisabled { get; set; }
+
     /// <summary>
     /// The request model.
     /// </summary>
@@ -100,7 +105,7 @@ public class MappingModel
     /// </summary>
     public object? Data { get; set; }
 
-    /// <summary> 
+    /// <summary>
     /// The probability when this request should be matched. Value is between 0 and 1. [Optional]
     /// </summary>
     public double? Probability { get; set; }