chore: fix windows specific script errors

[dy0gu]

Summary

This PR aims to solve the errors thrown by just l and just _touch on Windows systems.

just l

The linter succeeds in CI but not locally on my Windows machine. This is because it seems to not lint code with the #[cfg(target_os = "windows")] directive as the runner OS is Linux. In the future I suggest using a matrix runner in CI that runs the same linter workflow on both Windows and Unix so every OS is covered.

These were the fixes I had to implement on my local Windows machine, as recommend by the linter:

• Removed unnecessary explicit references (&)
• Added #[cfg(not(windows))] to Linux only variables, avoiding unused variable errors
• Wrote hexadecimal with equally sized groups of digits

just _touch

Made the script call powershell explicitly, this allows the user to use either CMD, Powershell, or any other shell of their choice on Windows and still have the command called by Powershell under the hood.

Fixes other scripts by extension, like test-lintrule and test-transform, that relied on just _touch to function correctly.

Test Plan

Changes made do not require tests.

[ematipico]

Thank you ❤️