Add Portal Knights (#115)

* Add Portal Knights (draft)

This is the first draft for Portal Knights. It currently seems to function fine on Windows. I have not completed the Linux (Proton) support yet.

* Add Proton

Updated config to include Proton support.

* Add new Ports setup and WINE/Docker

* Add extract stage

* Create manifest.json

* Delete manifest.json

* Finalize Settings

* Final updates

* Update repo source

portal-knightsmetaconfig.json

@@ -0,0 +1,7 @@
+[
+    {
+        "ConfigFile": "server_config.json",
+        "AutoMap": true,
+        "ConfigType": "json"
+    }
+]