Check whole hashbang line if it is /usr/bin/env

[Alduino]

Would fix #63.

Because pnpm uses the hashbang /usr/bin/env node, only checking until the first space as is current done will miss the node.

This change will only include the space if the text before the space is "/usr/bin/env", so that it doesn't break any existing code (/usr/bin/env would fail the check anyway)

This fix is working in my minimum reproduction of the issue (the Test stage)

Running it in the original repository that I found the bug in, it is getting past where it got before (it doesn't get the %1 is not a valid command error) but now at the end of the postinstall it gets another error (Install & Build stage):

apps/desktop postinstall: 'li.js" install-app-deps' is not recognized as an internal or external command,
apps/desktop postinstall: operable program or batch file.
apps/desktop postinstall:   • exited          command=app-builder.exe code=0 pid=6960
apps/desktop postinstall: D:\a\Muzik\Muzik\apps\desktop>li.js" install-app-deps

I'm not sure if that is caused by this change or not though, because there is no ground truth to compare to.

[develar]

Thanks!