worked on getting this building on windows for me to investigate the issue w/ data explorer not launching, made a few improvements to the windows build scripts too while i was in there.

changes:

• switch Configure helper function to use a list of args instead of a single string, so that e.g. paths with spaces won't break it (?probably at least, I didn't actually have any spaces in the paths of mine so idk)
• move breeze-icons build to above kiconthemes, since build for the latter was failing from the former not being there yet
• skip re-downloading zips if they've already been downloaded (same as how cloning of git repos was already handled)
• added one stray include that was missing
• change copied dll name from zlibd.dll to zd.dll
• add copying of qsqlited.dll which is required for DataExplorer (this closes Data Explorer fails to launch #20 and i can confirm DataExplorer built after making this change launches for me)

a couple other notes from stuff i ran into, but which aren't changed in this PR:

• windows-build.ps1 needs QTDIR environment variable to be set, not mentioned in BUILDING.md
• Qt 9 was the lowest version that worked (QT_MIN_VERSION is 8 and BUILDING.md mentions Qt 6)
• needs a python version with lxml installed (the CI scripts already handle this but the build docs should probably mention it for manual builds)
• the copying over of the sqlite dll would also need to be added to the CI scripts, I only added it to the powershell build script here