Phase 3: the Mangrove Mire poisons anyone without Mire Waders

- Companion mod zone hazards (zone/ZoneHazards.kt, data in
  data/cobblesurvival/zone_hazards/): in the Mire a player without an
  item from #cobblesurvival:mire_protection gets Poison every 5 seconds,
  with a one-time warning. Potions, milk and golden apples still help.
- Mire Waders: KubeJS leather boots, dropped by the Westmarch and Verdant
  Jungle guardians (the zones before the Mire), per Adrian's boss rule.
- Self-test mire_poisons_without_waders.
- Allow-list Cobblemon's misspelt jigsaw state in
  habitats/parched_peat_bog7.nbt, which test players now reach.

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

mod/src/main/kotlin/dev/cobblesurvival/CobbleSurvival.kt

@@ -9,6 +9,7 @@ import dev.cobblesurvival.selftest.SelfTest
 import dev.cobblesurvival.world.OnlyPokemon
 import dev.cobblesurvival.zone.Guardians
 import dev.cobblesurvival.zone.ZoneCondition
+import dev.cobblesurvival.zone.ZoneHazards
 import dev.cobblesurvival.zone.Zones
 import net.minecraft.commands.Commands
 import net.minecraft.core.BlockPos
@@ -57,6 +58,7 @@ class CobbleSurvival {
         ZoneCondition.register()
         NeoForge.EVENT_BUS.addListener(Zones::onAddReloadListeners)
         Guardians.register()
+        ZoneHazards.register()
         SelfTest.register()
     }