Port IronAgeFurniture to NeoForge 1.20.1

[SkyBlade1978]

Summary

• backport IronAgeFurniture 0.3.0 to Minecraft 1.20.1 early NeoForge
• build against NeoForge 47.1.106 while supporting the 47.1.99+ 47.x line
• retain the Forge-era Java API, mods.toml and forge condition schema required by this NeoForge generation
• preserve all tested 1.20.1 gameplay, compatibility, namespace and saved-world behavior
• keep BOP, BWG and Immersive Engineering integrations optional and runtime-gated
• add deterministic artifacts, Eclipse/Buildship support and release/CI routing for 0.3.0.120012

Validation

• user-completed Eclipse and in-game acceptance testing
• clean local check, build, Javadoc and release-artifact audit
• deterministic catalog, resource, metadata, Maven-coordinate, namespace and repository-hygiene checks
• Eclipse project/launch generation and production classpath verification
• packaged dedicated-server startup on NeoForge 47.1.99 and 47.1.106
• isolated and combined BOP 18.0.0.598, BWG 1.5.11 and IE 10.1.0-171 runtime probes
• combined probe validated 1,380 recipes and 1,364 recipe advancements