add support for REST-ful API building

- allow parameters within url
- allow different methods other then just POST
-> still needs to be tested!

Pilz.Net/Api/ApiRequestInfo.cs

@@ -6,4 +6,6 @@ public record class ApiRequestInfo(
     ApiMessage? Message,
     [property: MemberNotNullWhen(true, "AuthKey")]
     bool IsAuthenticated,
-    string? AuthKey);
+    string? AuthKey,
+    string Url,
+    string Method);