Phase 5: field moves from Cobblemon HMs

Adrian (2026-10-31): use Cobblemon HMs; mining ore is the one hard
requirement, furnaces get lit by a Pokemon inside a Phase 6 machine.

- Cobblemon HMs 4.1.0 in the pack (Modrinth), default config.
- Self-test rock_smash_mines_veins: HMs' Rock Smash breaks a
  regenerating vein, the ore drops and the vein becomes a regenerator.
- HMs' Trainer Ditto (a wild Ditto underneath) is exempt from the
  hostility scan and the stray despawn (world/SpecialPokemon.kt).
- Docs: licenses, addon status, design, balance, roadmap note,
  Phase 5 checklist with the open questions for Adrian.

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

docs/balance.md

@@ -27,6 +27,7 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | Guardian strength | strongest Pokémon spawning in the zone, band top + 5 levels, 1.5× size, uncatchable | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`GUARDIAN_*`), `world/zones.json` → `guardian.species` | |
 | Guardian drops | Button Isle 10 Poké Balls + 4 Potions; Southwold 6 Great Balls + 4 Exp. Candy S; Westmarch and Jungle Mire Waders + 4 Pecha Berries + 2 Exp. Candy M; Mire and Highlands 3 Icy Rocks + 4 Super Potions; Sunscorch 3 Heat Rocks + 2 Exp. Candy L; Frostpeak and Deep Dark 3 Icy Rocks + 2 Exp. Candy L; Deep Sea Mystic Water + 3 Exp. Candy M | Decided (Adrian, 2026-10-30) | `world/zones.json` → `guardian.drops` | 3 rocks make one full fur or hide set |
 | Mire poison | Poison I for 7 s, renewed every 5 s while in the Mire without Mire Waders | Decided (Adrian, 2026-10-30) | `datapacks/core/data/cobblesurvival/zone_hazards/mire.json` | Vanilla Poison stops at half a heart |
+| Field moves (Cobblemon HMs) | mod defaults: all 39 abilities on, no level minimum, no fullness or friendship cost; Rock Smash breaks up to 32 connected ore blocks with no cooldown | Placeholder | `config/cobblemon_hms.json` (generated by the mod; the pack ships none yet) | Rock Smash mines any ore, whatever pickaxe the player has. HMs' `minLevel` is the player's XP level, not the Pokémon's |
 | Level pressure | full experience up to 5 levels above the zone's band, then 10 % less per level, at least 10 % (Exp. Candy and commands exempt) | Decided (Adrian, 2026-10-30) | `world/zones.json` → `level_pressure` | E.g. on Button Isle (up to Lv 10): Lv 15 full, Lv 20 half, Lv 24+ a tenth |
 | Strong flyer | ridable through the air with top speed ≥ 60 or top stamina ≥ 85 (Cobblemon ride stats) | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`STRONG_FLYER_*`) | 29 species |
 | High zone for strong flyers | band starts at Lv 30 or more (Sunscorch, Frostpeak, Deep Sea, Deep Dark, Basalt Furnace) | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`HIGH_ZONE_LEVEL`) | |