Entries get a World/Body setting. In body mode offsets, heights and wings
follow the body's facing and lie along the body while gliding or swimming,
so wings stay on the back. Rings circle the body but keep their world
angle, so they do not turn with the player. New wings default to body;
presets and rewards stay in world mode and look exactly as before.
Add the remaining particles, including colour, colour transition, block
and item particles, which take their colours or a new block setting from
the entry. Only particles that cover the screen, show only under water or
need a target stay out.
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.