NovoAtlas 1.6.0 for Minecraft 26.1.x

This update comes with a large internal migration from Architectury to setup based on Jared's Multiloader Template using Fabric Loom and Neo Loom. There may still be some issues with the build artefacts themselves, particularly on Neoforge. So, apologies in advance!

• Updated to Minecraft 26.1.2 (should support all 26.1.x versions)