Describe the solution you'd like
a command that disables fireworks like /pmmo @A fireworks (true,false) and if you are in multiplayer or a button in settings

Why is this feature needed
In multiplayer, when we are all new, it is annoying and when you create new worlds

Describe alternatives you've considered
maybe for a medal I don't know with the stone symbol with a shield "combat" or tool (level10) like the effects of positions and adding the totem of importance of blocks new tools or combat and maybe they are not visible

Additional context
Add any other context or screenshots about the feature request here.
I was playing with friends on a "hardcore" server and 15 people all on generated fireworks etc. I mean, okay, but a lot of people at the same time and we talked about these achievements, like Vanilla's message in the chat, knowing that the level had gone up. to

• The player now has level 10 "stone age" in combat.
  in all the fireworks they eat, sleep etc.

Fireworks are (by Minecraft itself) handled server side. The server owner can already modify/remove the fireworks settings from the minecraft/<world name>/serverconfig/pmmo-Perks.toml file.

An example of what needs to be removed/modified:

[[Perks.For_Event.SKILL_UP]]
    skill = "fishing"
    perk = "pmmo:fireworks"

You can just remove all these perks from the file (make sure the server is shut down at the time) or you could add an extra option to them like per_x_level = 10 to make fireworks only spawn every ten levels.