Tracker: Rename "Development" type to "DX" (for "Developer eXperience")
"DX" is short for "Developer eXperience". It is analogous to UX (User eXperience), but it mainly affects developers rather than users. The DX type would be used for issues that aim to make it easier to build and maintain MuseScore's code.
Developer experience doesn't affect users directly, but having good DX can lead to faster development of features that do matter to users, and less time wasted fixing build errors, etc.
Build errors are not DX issues, but they might be symptoms of DX issues.