DURNAN 0.2.0 TESTING

1. Create a test world with cheats enabled.
2. Stand in an open area.
3. Run: /function fritzsrpg:bosses/summon_durnan
4. Verify 400-point boss bar, three phases, particles, sounds and area attacks.
5. Kill Durnan and check drops:
   - Broken Heartforge Hammer
   - Ashen Core
   - Durnan's Trophy
   - 1-3 Ashen Armor Fragments
6. Verify advancement: The Ashen Smith Falls.

Prototype note: Durnan currently uses a Piglin Brute and Netherite equipment as a stable placeholder.
