[DAI] Boxhead (Resource)

# Boxhead Resource v0.3.0 HD

## Initial Release

- Released the official **Boxhead HD companion Resource Pack**.
- Added automatic DAI companion-pack association with the Boxhead MAIN experience.
- Synchronized the Resource Pack with Boxhead Data v0.3.0 and DAI 3.3.

## Infected HD Overhaul

Added custom native-entity models for:

- Zombie
- Mangled
- Mutant
- Giant

Rebuilt the infected from early prototype geometry into more detailed custom DAI meshes while preserving their intended silhouettes.

## Infected Materials

Added authored 64×64 materials for:

- Skin
- Shirts
- Pants
- Blood
- Eyes
- Giant-specific detail
- Mangled-specific detail
- Mutant-specific detail

## Firearm Models

Added detailed multi-part 3D models for:

- Pistol
- Pump Shotgun
- Hand Cannon

Added dedicated:

- Idle models
- Firing models
- Moving slide / pump / upper assemblies
- First-person transforms
- Third-person transforms

## Firearm Materials

Added dedicated textures for:

- Dark steel
- Mid steel
- Light steel
- Walnut
- Rubber grip
- Brass
- Copper
- Red accents
- Muzzle surfaces
- Muzzle flashes

## Ammunition Models

Added custom models for:

- Light rounds
- Heavy rounds
- Shotgun shells
- Spent casings

## Projectile Visuals

Added custom models and dedicated materials for:

- Light bullets
- Heavy bullets
- Shotgun pellets

Removed reliance on placeholder vanilla-block projectile presentation.

## Interface Artwork

- Added custom CREATE WORLD icon.
- Added custom CONTINUE icon.
- Added upgraded Boxhead pack artwork.

## DAI 3.3 Companion Pass

- Updated managed companion metadata to v0.3.0.
- Preserved automatic Resource Pack activation.
- Verified all item-model mappings.
- Verified all model-to-texture references.
- Preserved existing HD artwork without destructive recompression.
- No texture resizing or detail reduction.