ecs conversion

working on ecs in all libs/apps/examples

getting new gw_ecs to compile in other libs

gw_bevy -> gw_ecs

more examples

default features includes parallel

added pipeline example to show Removed<C> and .added()

added Removed<C> as system param

moved some storage stuff around

add_component -> insert_component

must use mut World to insert/remove components

updated maintain and Entities apply

moved Entities to separate file

removed some unused files

removed warning