Add install patch for wcms themes

composer.json

@@ -88,11 +88,15 @@
         "wcms/uw_sites_all": "dev-8.x-1.x"
     },
     "extra": {
-        "installer-types": ["wcms-module"],
+        "installer-types": [
+            "wcms-module",
+            "wcms-theme"
+         ],
         "installer-paths": {
             "../../core": ["type:drupal-core"],
             "modules/features/{$name}": ["type:wcms-module"],
-            "modules/contrib/{$name}": ["type:drupal-module"]
+            "modules/contrib/{$name}": ["type:drupal-module"],
+            "themes/{$name}": ["type:wcms-theme"]
         },
         "patches": {
             "drupal/samlauth": {