zero_days: a condescending message

Example usage and output:

```shell $ zero_days "we last had this conversation"

+------------------------------------------------------------------------------+ | | | It has been | | | | _ | | / _ \ | | / / / / | | / // / | | _/ | | | | days | | | | since we last had this conversation | | | +------------------------------------------------------------------------------+

```

install

shell $ cargo install zero_days