Unify package structure

remove 'plugin' and 'api' packages to provide a simplistic package structure

Signed-off-by: Nick Minkler <sleaker@gmail.com>

move data

move events, ai, commands

move util, config, chat, service, resource

plugin, more events,

materials

inventory, windows,  materials,

enchantments

prep protocol

last bit of fixes
finish imports and merge skylands additions.

Signed-off-by: Nick Minkler <sleaker@gmail.com>