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.Shared/IMapping.cs

@@ -108,6 +108,14 @@ public interface IMapping
     /// </value>
     bool IsProxy { get; }
 
+    /// <summary>
+    /// Gets a value indicating whether this mapping is disabled.
+    /// </summary>
+    /// <value>
+    /// <c>true</c> if this mapping is disabled; otherwise, <c>false</c>.
+    /// </value>
+    bool IsDisabled { get; set; }
+
     /// <summary>
     /// Gets a value indicating whether this mapping to be logged.
     /// </summary>
@@ -135,7 +143,7 @@ public interface IMapping
     /// </summary>
     object? Data { get; }
 
-    /// <summary> 
+    /// <summary>
     /// The probability when this request should be matched. Value is between 0 and 1. [Optional]
     /// </summary>
     double? Probability { get; }