fix: Enables XRBase plugin for toolkit. Usually this is enabled through...

fix: Enables XRBase plugin for toolkit. Usually this is enabled through OpenXR, but OpenXR is not required.

RWTHVRToolkit.uplugin

@@ -47,6 +47,10 @@
 		{
 			"Name": "Niagara",
 			"Enabled": true
+		},
+		{
+		"Name": "XRBase",
+		"Enabled": true
 		}
 	]
 }