[fix] resolves #58 on newer win32 systems

[BePo65]

On newer win32 systems WMIC is no longer available. The solution recommended by Microsoft is using Powershell.

This pr adds spawning a Powershell script, if WMIC does not exits on a win32 system.

Solves issue #58 on this project and should also solve issue bahmutov/start-server-and-test#384.

[MikeMcC399]

@BePo65

• I successfully ran both of your PRs against the GitHub Actions workflow mentioned in Add GitHub Actions (CI)? #61 👍🏻

Tip

• If you write in your original post resolves #58, then the PR automatically gets linked to the issue. See Linking a pull request to an issue using a keyword. You have to write the keyword directly before the issue number, without using the word "issue".

[MikeMcC399]

For consistency, the https://github.com/indexzero/ps-tree/blob/master/README.md#windows section, which refers to WMIC, needs to be updated.