Add Temporary Files support.

[ALizarazoTellez]

Add some equivalent to the Linux command: mktemp

[thiagonache]

Add some equivalent to the Linux command: mktemp

Hi @anderson-lt, I'm wondering why you cannot use Go's os.CreateTemp or Exec with mktemp?

[ALizarazoTellez]

One of the facilities offered by this library is to write common shell programs in Go, and avoid endlessly repeating the syntax of if err != nil { ... } and although the Exec function allows you to use this command in a clean way, I consider in my opinion that the command should already be in the library since this command is found in practically all UNIX shells.

[suyash-sneo]

Is this still a prospective feature? I was thinking of picking this up.

[bitfield]

@suyash-sneo the question is exactly what the feature would be, isn't it? There's no point writing a script.MkdirTemp function that simply calls the standard library—that would add code without adding value.