Port IronAgeFurniture to NeoForge 26.1.2

[SkyBlade1978]

Summary

• port IronAgeFurniture to Minecraft 26.1.2 on NeoForge 26.1.2.94 and Java 25
• retain the complete vanilla and contemporary Biomes O' Plenty furniture catalog with optional, condition-gated integration
• carry forward recipe-advancement, flammability, lava-lamp, texture-validation, and save-compatibility fixes
• provide deterministic release artifacts and a duplicate-free Java 25 Eclipse/Buildship setup

Local verification

• clean check build javadoc verifyReleaseArtifacts verifyReleaseChecksums prepareEclipse verifyEclipseProductionClasspath
• 9,223 JSON resources and 3,750 locale keys validated
• 546 conditional BOP recipes and 546 conditional advancements validated
• main, sources, and Javadocs hashes matched across two clean builds
• user completed manual in-game testing of this branch

Release identity

• version: 0.3.0.2601022
• Maven: zone.moddev.mc:iron-age-furniture:0.3.0.2601022
• candidate commit: 30c790d5adac77618b53dcec3944db1dda364d8a