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>

.github/workflows/ci.yml

@@ -0,0 +1,58 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build-and-smoke-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "21"
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.25"
+
+      - name: Install packwiz
+        # packwiz has no tagged releases; pin a commit when one is known good.
+        run: go install github.com/packwiz/packwiz@latest
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Python packages for the world checks
+        run: pip install numpy
+
+      - name: Build companion mod and export both pack formats
+        run: python3 tools/build.py
+
+      # Booting the server needs eula=true. Set the repository variable
+      # MINECRAFT_EULA_ACCEPTED to "true" only if you accept the Minecraft EULA
+      # (https://aka.ms/MinecraftEULA) for this CI server. Until then CI runs
+      # the mod discovery + dependency check, which needs no EULA.
+      - name: Quick check (smoke checks + sampled world)
+        if: vars.MINECRAFT_EULA_ACCEPTED == 'true'
+        run: python3 tools/quick_check.py --accept-eula
+
+      - name: Mod discovery and dependency check (no EULA)
+        if: vars.MINECRAFT_EULA_ACCEPTED != 'true'
+        run: python3 tools/smoke_test.py --load-only
+
+      - uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: pack-exports
+          path: |
+            build/*.mrpack
+            build/*-curseforge.zip
+            build/server/logs/latest.log
+          if-no-files-found: ignore