GroundZeroCore Resource Pack v26 - Original Item Looks Restored

Built on v25.

Resource pack fixes:
- Removed generated vanilla fallback item textures from assets/minecraft/textures/item/.
- This restores the original vanilla/base look for items used by drug systems like XTC/coke base carriers.
- Kept all custom GroundZero textures under assets/minecraft/textures/item/gz/.
- Kept casino icons.
- Kept static main menu.
- Kept police, papers and drug textures.

Why:
- v25 added fallback PNGs for vanilla item roots to avoid false missing-texture warnings.
- Minecraft already provides vanilla item textures, so those fallback PNGs were unnecessary and changed the look of existing items.
- v26 removes those fallback files and keeps only actual custom GroundZero textures.

Validation:
{
  "removed_root_vanilla_item_textures_count": 46,
  "no_root_sugar_texture": true,
  "no_root_blaze_powder_texture": true,
  "casino_icons_kept": true,
  "drug_textures_kept": true,
  "police_textures_kept": true,
  "papers_kept": true,
  "custom_missing_textures": 0,
  "json_errors": 0
}

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