Regionalize occupied homeless camp

[LovamKicsiGazsii]

Summary

None

Purpose of change

Continues regional terrain project,

Describe the solution

Separated zombie homeless camps and NPC camps. Fixed wrong merge in homelesscamp.json and ordered it. Replaced terrains with their regional counterparts. Fixed wrong terrain appearing under NPCs. Artificial forests were removed. Made the fortresses rectangular.

Describe alternatives you've considered

None.

Testing

Debug-spawned a homeless camp mutable and the Occupied Homeless Camp. Talked to the NPCs, and completed their mission chain.

Additional context

None.

[dseguin]

You may want to add a migration for the removed special id in case it would break existing saves, something like

diff --git a/data/json/overmap/overmap_special/overmap_special_migration.json b/data/json/overmap/overmap_special/overmap_special_migration.json
index 8a414eaaef..5c982f1426 100644
--- a/data/json/overmap/overmap_special/overmap_special_migration.json
+++ b/data/json/overmap/overmap_special/overmap_special_migration.json
@@ -38,5 +38,10 @@
     "type": "overmap_special_migration",
     "id": "Mine Entrance",
     "//": "Removed - no new id"
+  },
+  {
+    "type": "overmap_special_migration",
+    "id": "Homeless Camp",
+    "new_id": "Occupied Homeless Camp"
   }
 ]

[LovamKicsiGazsii]

You may want to add a migration for the removed special id in case it would break existing saves, something like

diff --git a/data/json/overmap/overmap_special/overmap_special_migration.json b/data/json/overmap/overmap_special/overmap_special_migration.json
index 8a414eaaef..5c982f1426 100644
--- a/data/json/overmap/overmap_special/overmap_special_migration.json
+++ b/data/json/overmap/overmap_special/overmap_special_migration.json
@@ -38,5 +38,10 @@
     "type": "overmap_special_migration",
     "id": "Mine Entrance",
     "//": "Removed - no new id"
+  },
+  {
+    "type": "overmap_special_migration",
+    "id": "Homeless Camp",
+    "new_id": "Occupied Homeless Camp"
   }
 ]

Thank you!