Added
- `moulti-askpass`, an askpass helper for Moulti
- `moulti run` automatically sets `SSH_ASKPASS`, `SSH_ASKPASS_REQUIRE` and `SUDO_ASKPASS` environment variables so as to leverage `moulti-askpass`.
- `moulti run --print-env` outputs all environment variables set by `moulti run`.
- `moulti run`: the environment variable `MOULTI_RUN_OUTPUT` provides better control on unexpected output.
- dividers: non-collapsible steps that simply display text.