Cobblemon Survival Pack: phases 0-2 and Phase 3 zones and hazards

Free NeoForge 1.21.1 modpack on Cobblemon 1.8.4 built with packwiz, plus
the Kotlin companion mod (cobblesurvival) and its built-in data pack.

- Phase 0: packwiz pack with Modrinth/CurseForge cross-links, build and
  export tooling, Prism instance sync, test server with smoke checks.
- Phase 1: Poke Ball shaped island (WorldGen Editor preset, seed isle-26),
  Adrian's biome list, no natural ore, structures without ore or vanilla
  mobs, no Nether portals, world template builder and world report.
- Phase 2: permadeath (CobbleHardcoreMon plus the companion mod's gap
  fixes), Revival Charm, expensive Healing Machine, Lootr refreshing
  loot, in-game self-tests on Minecraft's GameTest framework.
- Phase 3 so far: 14 zones with their own spawn pools and level bands
  (tools/zone_layout.py, tools/zone_spawns.py, "zone" spawn condition),
  Cold Sweat heat and cold as gates with boss-drop insulation recipes,
  spawn survey and hazard self-tests in tools/quick_check.py.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

world/world.json

@@ -0,0 +1,34 @@
+{
+  "name": "Cobblemon Survival Island",
+  "seed": "isle-26",
+  "level_type": "cobblesurvival:island",
+  "preset": "pack/config/worldgen_editor/presets/cobblesurvival_island.json",
+  "pregen_radius": 1700,
+  "border_margin": 96,
+  "chunky": {
+    "url": "https://cdn.modrinth.com/data/fALzjamp/versions/LuFhm4eU/Chunky-NeoForge-1.4.23.jar",
+    "sha1": "ab0c74743a653020fe2dfc4986b43e893947f3e9"
+  },
+  "gamerules": {
+    "doMobSpawning": false
+  },
+  "quick_check": {
+    "spawn_radius": 128,
+    "structure_radius": 96,
+    "structures": [
+      "minecraft:stronghold",
+      "minecraft:mineshaft",
+      "minecraft:trial_chambers",
+      "minecraft:ancient_city",
+      "#minecraft:village",
+      "minecraft:monument",
+      "#minecraft:ocean_ruin",
+      "cobblemon:ruins/rooted_gimmi_tower",
+      "cobblemon:ruins/temperate_gimmi_tower",
+      "cobblemon:habitats/natural_lightningrod"
+    ],
+    "absent_structures": [
+      "#minecraft:ruined_portal"
+    ]
+  }
+}