[DAI] Hollow Spiral (Resource)

# HollowSpire Resource Pack v0.1.2

- Updated companion integration for **DAI 1.9.5**
- Added automatic resource-pack enablement metadata
- Added stable `companion_id: hollow_spire`
- Added version-independent companion matching
- Retained namespace-based `data/hollow_spire` ↔ `assets/hollow_spire` discovery
- Removed stale vanilla-item model overrides from the earlier vertical-slice build
- Vanilla bows, swords, compasses, feathers, amethyst shards, glow berries, and other unrelated items now retain their normal appearance
- Preserved all `hollow_spire` namespaced models and textures
- Preserved Hollow Spiral's industrial/cyber-ruin environmental textures
- Kept vanilla mob render chains untouched for the current vanilla-mob gameplay mode
- Replaced outdated installation documentation with current Hollow Spiral / DAI 1.9.5 instructions