Add support for linux 'watch' command

[Silas]

The linux watch command is used to run a command at an interval and display the output of the command in a refreshing terminal.
In my case i try to display a table from the pterm lib using the watch command but it seems like something with the encoding is getting messed up.
My code looks somehow like this:

func test() error {
	tableData := pterm.TableData{
		{"Firstname", "Lastname", "Email"},
		{"Paul", "Dean", "[e-mail]"},
	}
	err := pterm.DefaultTable.WithData(tableData).WithHasHeader(true).WithHeaderRowSeparator("─").WithRowSeparator("─").WithBoxed(true).Render()
	if err != nil {
		return err
	}
	return nil
}

func main() {
	if err := test(); err != nil {
		log.Fatal(err)
	}
}

with the expected output:

however using the watch command (for example to live fetch data from apis) i see something like this:

Would love to see support for this in pterm as its very useful in a lot of usecases.

[Marvin Wendt]

Hi @xsilas, by default watch does not support color output. You can enable it with the -c flag (watch -c your_command). Let me know if this fixes your problem :)

Alternatively, you could also disable the colors in PTerm, but that's probably not what you want.

[Silas]

Thanks for the fast response, indeed this fixes it. Did not know that flag - thanks man!