Team- and user-specific particles become presets built from entries,
tournament and egg hunt particles become fixed reward designs, and the
old particle enums, ParticleEnum and ParticleData are removed. The
particle menu temporarily lists only unlocked presets.
Introduce parameters, particle types, designs and entries that build the
existing particle elements, store each of the 7 particle slots in its own
UserConfig key, and let LobbyPlayer select a slot next to the old enum
particles. Slots 4-5 need a team, 6-7 the server team.