IRONWIND - BELLS & WHISTLES GLASS TAG FIX

Minecraft: 1.21.1 NeoForge
Paxi installation:
1. Copy Ironwind_BellsAndWhistles_GlassTagFix.zip into:
   config/paxi/datapacks/
2. Keep the ZIP compressed.
3. Restart the game or use /reload in the world.

Fixes:
- Adds compatibility alias c:glass -> #c:glass_blocks
- Overrides bellsandwhistles:metro_window recipe to use c:glass_blocks

Verification:
- Open JEI and inspect Metro Window.
- Recipe should show Metro Casing + any valid glass block -> 6 Metro Windows.
