ENH: Add gm command for completing other players' missions

[MustacheMan2]

Is your feature request related to a problem?

There are a few select achievements that are currently impossible to complete naturally, so having the option to provide players with said achievements would be nice. This would also be useful if there was any select case where a mission or achievement is bugged for a player.

Describe the solution you'd like

something like /completemission but with a parameter for another player, or simply an addition to /completemission

Repository breaking implications

No response

Describe alternatives you've considered

No response

Additional context

No response

[EmosewaMC]

I would rather work on fixing the underlying issue than implement this as a workaround. completemission is only intended to be used for debugging, not as a moderating command. Which missions do you believe are bugged that require fixing (excluding unimplemented missions)?

[MustacheMan2]

I am referring to the currently impossible reputation (past tier 1 or so) and unimplemented behavior achievements, which could take a long time to be completeable. The last Nexus Force commendations achievement is also currently impossible to achieve without added missions. It's also highly unlikely that late tier achievements like reputation and The Visitor would be even possible to complete due to the whole everyone's got their own private server situation. These things are far from necessary, but getting the u-score and item rewards are nice as well as visual completion for completion sake even if it isn't natural. But again, I believe this along with completemission are important things to be able to fall back on in the case that something goes wrong, in the same way the mail function is for players to receive items they did not properly receive or lost.