stank application: option to exclude by file extension and by basename

[aep-sunlife]

For example, *.zsh, *.zshenv, *.zlogin, *.zlogout, *.zprofile, and *.zshrc; as well as zshenv, zlogin, zlogout, zprofile, and zshrc should be excluded from ShellCheck scans until it gets its act together and fixes the zsh parser.