GroundZeroCore Resource Pack v27 - Vanilla Missing Texture Fix

Built on v26.

Fixed:
- Re-added safe fallback textures for vanilla items/blocks that are referenced by GroundZero model files and were showing as missing/purple-black on your client.
- Specifically covers visible missing examples:
  - Survival Inventory
  - Brown Mushroom
  - Azalea Leaves
  - Scaffolding
  - Black Concrete
- Re-scanned all model texture references after the fix.

Important:
- Existing custom GroundZero textures under assets/minecraft/textures/item/gz/ were not replaced.
- Drugs, police, papers and casino icons were kept.
- These fallback textures only exist to stop missing-texture icons where the pack overrides a vanilla item model.

Validation:
{
  "json_errors": 0,
  "missing_model_textures_after_fix": 0,
  "textures_created_count": 47,
  "survival_inventory_added": true,
  "brown_mushroom_added": true,
  "azalea_leaves_added": true,
  "scaffolding_added": true,
  "black_concrete_added": true,
  "gz_drugs_kept": true,
  "gz_police_kept": true,
  "gz_papers_kept": true,
  "casino_icons_kept": true
}

Created fallback textures:
[
  "assets/minecraft/textures/item/amethyst_shard.png",
  "assets/minecraft/textures/item/azalea_leaves.png",
  "assets/minecraft/textures/item/black_concrete.png",
  "assets/minecraft/textures/item/blaze_powder.png",
  "assets/minecraft/textures/item/blaze_rod.png",
  "assets/minecraft/textures/item/bone_meal.png",
  "assets/minecraft/textures/item/book.png",
  "assets/minecraft/textures/item/brewing_stand.png",
  "assets/minecraft/textures/item/brown_dye.png",
  "assets/minecraft/textures/item/brown_mushroom.png",
  "assets/minecraft/textures/item/brush.png",
  "assets/minecraft/textures/item/cauldron.png",
  "assets/minecraft/textures/item/chest.png",
  "assets/minecraft/textures/item/clay_ball.png",
  "assets/minecraft/textures/item/compass_00.png",
  "assets/minecraft/textures/item/composter.png",
  "assets/minecraft/textures/item/cookie.png",
  "assets/minecraft/textures/item/diamond_axe.png",
  "assets/minecraft/textures/item/emerald.png",
  "assets/minecraft/textures/item/flower_pot.png",
  "assets/minecraft/textures/item/ghast_tear.png",
  "assets/minecraft/textures/item/glass_bottle.png",
  "assets/minecraft/textures/item/glowstone_dust.png",
  "assets/minecraft/textures/item/gold_ingot.png",
  "assets/minecraft/textures/item/honey_bottle.png",
  "assets/minecraft/textures/item/iron_axe.png",
  "assets/minecraft/textures/item/iron_nugget.png",
  "assets/minecraft/textures/item/iron_pickaxe.png",
  "assets/minecraft/textures/item/knowledge_book.png",
  "assets/minecraft/textures/item/magenta_dye.png",
  "assets/minecraft/textures/item/nether_star.png",
  "assets/minecraft/textures/item/paper.png",
  "assets/minecraft/textures/item/prismarine_crystals.png",
  "assets/minecraft/textures/item/quartz.png",
  "assets/minecraft/textures/item/rabbit_hide.png",
  "assets/minecraft/textures/item/red_dye.png",
  "assets/minecraft/textures/item/redstone_torch.png",
  "assets/minecraft/textures/item/repeater.png",
  "assets/minecraft/textures/item/rooted_dirt.png",
  "assets/minecraft/textures/item/saddle.png",
  "assets/minecraft/textures/item/scaffolding.png",
  "assets/minecraft/textures/item/smoker.png",
  "assets/minecraft/textures/item/sugar.png",
  "assets/minecraft/textures/item/tripwire_hook.png",
  "assets/minecraft/textures/item/wheat_seeds.png",
  "assets/minecraft/textures/item/white_dye.png",
  "assets/minecraft/textures/item/survival_inventory.png"
]
