Darker Iron

Updated with new pack.mcmeta multi-version support.

• Updated for 1.20
• Changed bolts on trapdoor to align with iron block

Same content, converted to 1.19.4 format

v1.1 - updated pack icons and folder name

Same content, converted to 1.19.3 format

v1.1 - updated pack icons and folder name

Updated to prettier pack icon and more detailed pack folder name