Dynamic `.cmd` suffix for Terminal's first arg on Windows

[Mandera]

Hardcoded like this now, checking for npm and jest. Can detect if program is unavailable but program.cmd is available. Not sure if it can be done quickly

        if args[0] in ("npm", "jest") and VerInfo().windows:
            args[0] = f"{args[0]}.cmd"

[Mandera]

Alternatively catch programnotfounderror and retry with suffix, I don't really like that though. Worst case just make programs easier to edit with a class variable