increase biome check radius of jungle fortress.

add picture of end shipwreck and new boulders to curseforge page

config to keep end mineshafts completely in island

rename "spawnrate" for all structures that is separation based to "spawnAttemptSeparation" but it would break everyone's configs currently. Maybe I'll do the change when updating to 1.16.4 and use that version as an excuse lol

moved to fabric github