feat(multiplayer): tournament management command support

[CloneWith]

Reference in osu!wiki.

Some methods are implemented in the spectator server, then it's necessary to communicate with it using signalr.

Update 2026-06-14: Nope, it's safer to use Redis for communication and implement a wrapper for those.

Progress

• Client / Shared side: Add reminder multiplayer countdown type osu#24
• Main server side: feat(mp): add !mp command handling support #149
• Spectator side: feat(mp): add support for !mp commands in multiplayer osu-server-spectator#7

TODOs

This only includes plans for lazer clients only.

Supported

• name / set / password / size / host
• settings
• kick / ban
• start / abort
• team / move
• timer / aborttimer (need changes in spec and client)
• lock / unlock
• map / mods

Partial

• make: No match history page support (optional?)
• addref / removeref / listrefs: Clients won't reflect this change

Unsupported

• makeprivate: No known support for limited history sharing
• clearhost