closes #50427
fixes hardcoded path in our qwc-workspace.js component
works around hardcoded paths in https://github.com/qomponent/qui-directory-tree/blob/main/qui-directory-tree.js (I fully expect this part to be reverted later)
on Windows, it seems there is a different default order of files and directories, which resulted in a fact that on my Windows, files were first and directories also in a different order; that is bit clumsy if you just open DEV UI and see other file like a log or docker ignore, so I rewrote this to always select .java file first. when I tested it, the GreetingResource in a code start is selected first, which is better user experience
qui-ide-link results in an error, I suppose it is related to the fact that I don't have installed IDE on Windows, but that could happen to users as well when they just play with Quarkus? so I fixed the error