Feature Request - Option to change gamemode to spectator for limbo world

[RalphORama]

First off, this plugin was exactly what I was looking for! Thanks very much for creating it 😁

I think the ability to put players into spectator would be a good addition to this plugin - mainly, it would hide the UI and hand of the playermodel, making the experience feel somewhat cleaner in my opinion (see attached screenshots).

The config option could be something like:

world:
  # Dimensions: OVERWORLD, NETHER, THE_END
  dimension: "THE_END"
  # Gamemodes: SURVIVAL, CREATIVE, SPECTATOR, ADVENTURE
  gamemode: "SPECTATOR"
  # Load world from file
  # etc...

Before

After