Add FormUrlEncodedMatcher (#1147)

* FormUrlEncodedMatcher

* .

* Fix

* new

* support wildcard

test/WireMock.Net.Tests/MappingBuilderTests.ToCSharpCode_Server.verified.txt

@@ -24,7 +24,35 @@ server
             regex: false
         ))
     )
-    .WithGuid("98fae52e-76df-47d9-876f-2ee32e931d9b")
+    .WithGuid("98fae52e-76df-47d9-876f-2ee32e931002")
+    .RespondWith(Response.Create()
+    );
+
+server
+    .Given(Request.Create()
+        .UsingMethod("POST")
+        .WithPath("/form-urlencoded")
+        .WithHeader("Content-Type", "application/x-www-form-urlencoded", true)
+        .WithBody("name=John Doe")
+    )
+    .WithGuid("98fae52e-76df-47d9-876f-2ee32e931003")
+    .RespondWith(Response.Create()
+    );
+
+server
+    .Given(Request.Create()
+        .UsingMethod("POST")
+        .WithPath("/users/post1")
+        .WithBody(new JsonMatcher(
+            value: new
+            {
+                Request = "Hello?"
+            },
+            ignoreCase: false,
+            regex: false
+        ))
+    )
+    .WithGuid("98fae52e-76df-47d9-876f-2ee32e931001")
     .RespondWith(Response.Create()
     );