Generic finales for generic mine

[Night-Pryanik]

Summary

Content "Generic finales for generic mine"

Purpose of change

Add more "generic" finales for generic mine, as it was discussed in #56555.

Describe the solution

• Added feral archaeologist monster and its death drops list. Its description sucks, to be honest, but I can't invent something more interesting.
• Added 4 new "generic" finales for generic mine:
• • "True generic" variant (100 weight): just a dead end with a bunch of zombie miners, some miners' gear and minerals;
• • "Archaeology" variant (40 weight): essentially a rework of my own "archaeology" variant for cave mapgen from Cave jsonify #39610, but with new feral archaeologists, their gear and two crates with some potentially interesting archaeology loot in them, including spiral and vortex stones;
• • "Trencher" variant (50 weight): again, just a bunch of zombie miners with gear, minerals and working trencher (representing some mining machine);
• • "Breather" variant (30 weight): a breather hub monster with an artifact beneath it.
• The old "The Thing" finale is still here, but is given rather low weight for spawning (30).

Describe alternatives you've considered

None.

Testing

Debug-spawned mine finales dozens of times, checked if everything is ok.

Additional context

"True generic" variant

"Archaeology" variant

"Trencher" variant

"Breather" variant