Fix QIT config path in Windows

[Luc45]

On windows specifically there was a typo that would save config files in C:\Users\AppData\foo\woo-qit-cli.env-default instead of C:\Users\AppData\foo\woo-qit-cli\.env-default (Missing the final \ there)

This PR addresses it, and makes the Config function more uniform.

It also ignores the /dev dir to avoid conflicts while working in the Local Test Environment branch and switching back-and-forth.

Testing instructions

• Pull this branch
• Interact with QIT, nothing should change
• If you have a Windows VM around, try it in there, it should work as well

[zhongruige]

Tested this going through the default (no changes to auth) flow on macOS and I was able to create new test runs and, after renaming the existing directory, it created the new directory as expected and I was able to create new test runs, too.