Port to 26.1.2

[NotRyken]

Feel free to edit this, use it as a reference, or ignore it.

Code changes are mostly straightforward, build system changes are from https://gist.github.com/shedaniel/18d4eebf940e9c3296e87d994ebb2838 - I'm not familiar with multiversion preprocessors so can't really comment on how this may affect previous versions.

Limited in-game functionality tests have been completed on Fabric and NeoForge, no observed issues.

In the absence of CI/CD, Fabric and NeoForge jars are available at https://github.com/NotRyken/MapLink/releases/tag/v4.4.0%2Bmc26.1.2

Closes #108
Closes #109

[thebuildcraft]

Thank you very much. Now people can use your port until I have time to finish the update.

I was already kind of far: build scripts are working. I removed arch loom because they update so slowly. The code was even compiling with the new Xaero version. And I have new features. But then the university workload took my free time... So I haven't been able to test all those changes yet.

And about older versions: I think your port will not work for them because older versions still need the mappings.

I hope I can get around to finish the update next month. If not, I can link to your port on Modrinth :)