[suggestion] Shoggots build nests

[Biviho]

hi, seeing that it's possible to disable shoggots nest to naturally spawn in the world for those modpack that want to gate the mod in different ways, it would be a cool idea to add a config for nests to be built by shoggots in a similar way to the monolith.
This way a modpack maker can decide when is the better moment to rise the shoggoth treat by spawning them near some river.

Some good config would be:
-a dimension whitelist/blacklist
-a minimum distance between nests

[Shinoow]

This will fit in pretty well with the planned "building order" blocks that will be introduced with the ongoing overhaul of Shoggoths. You'd have a special block with a sign on it (probably), which when a Shoggoth encounters will build whatever the sign tells them to (so initially you'd have one for building a monolith and one for building a lair). The regular building AI will probably get new things added to it as well, so that they will naturally build other things than monoliths without player interaction.