[SkyBlade1978]

This brings the 1.21.11 version forward to Minecraft 26.1.2, Forge 64 and Java 25.

The existing items, blocks, recipes, High/Low Fantasy settings and eleven OreSpawn rules stay in place. OreSpawn is pinned to the published 4.1.0.2601021 release.

The main changes are:

• Move smith trades to Minecraft's data-driven system, keeping the same offers and prices.
• Update recipe loading, configuration screens, fluids and item textures for the new APIs. Both config buttons still open the same screen.
• Prepare older saves before Minecraft moves their dimension and player files. Preserve embedded-only players, current player files and saved capability data without letting stale backups trigger conversion.
• Keep older Forge ingredient tags working through the current common tags.

Most of the file count is generated trade and tag data.

The automated checks pass: 120 unit tests, all 46 required GameTests, client/server starts, both content modes and reconnects, fourteen world-upgrade profiles, and the modern-world safety cases. Forge 64.0.9 and 64.1.5 are covered. Clean builds produce the same main, sources and Javadoc jars.

The local manual test has also been accepted. Agent notes and generated test output are kept out of the commit and release jars.