Set wingman features type to string

Author: jneira

package.json

@@ -227,7 +227,7 @@
         },
         "haskell.plugin.tactic.config.features": {
           "scope": "resource",
-          "type": "Object",
+          "type": "string",
           "default": true,
           "markdownDescription": "Features set used by wingman (tactic) plugin"
         },