feat: add garmentunlock gm command

- /garmentunlock drops a garment straight into CoatWardrobe

- Mirrors /wingunlock for the 3300/3305 wardrobe path, no inventory round-trip

- Resolves item by ID first, falls back to name lookup filtered to garment slot

- Enforces wardrobe capacity and per-typeId dedup (matches HandleStore)

- FullSync via CoatWardrobe.SendContents so the item appears without relog