* fix: create directory for singleton test in `temp` instead of `home`
* fix: remove directory for singleton test at test end
* refactor: avoid extraneous declarations in singleton test
* refactor: reintroduce `userDataFolder` declaration in singleton test
* refactor: move cleanup before app exit in singleton test
* style: add missing semicolon
* refactor: set the user data path after pre-test cleanup in singleton test
* fix: release lock before cleanup in singleton test
* test: use custom userData folder for requestSingleInstanceLock()
* update test
* prefix test folder path
* fix: create userDataDir on requestSingleInstanceLock() if needed
* Trigger Build
