v2.6

The first pre-release for 1.19 fixed two bugs: MC-250932 and MC-249980. This release removes them from the pack, so if you haven't updated to the pre-releases then there's nothing new for you in this release.

In contrast to the small number of user-facing changes, there's been a big change in how this pack is developed. The actual source for the pack is in the fixes.ts file, and a homemade tool (written in TypeScript) converts it to an actual resource pack: that's what all the other .ts source files are for! This version is the first one to be built with the tool, which opens up some exciting possibilities in the future, such as supporting multiple MC versions with little extra work.