* Start ha-cli on tty1 instead of a getty
Instead of starting a getty start the ha-cli directly. This will show
the banner right on startup with the important information such as IP
address of the instance or the URL to reach it.
* Use default shell as root shell instead of HA CLI
Instead of using the ha-cli.sh script as login shell use the regular
shell. Amongst other things, this allows to run VS Code devcontainers
remotely via SSH or using scp. The HA CLI is still available using the
`ha` command.
In case the data partition is missing avoid using the Docker command.
The Docker command triggers a socket activation, which in turn makes
systemd wait for the data partition. This blocks entry into the shell
forever.
Just enter the shell in case data partition is not mounted.
The new readline utilty used by the CLI add-on requires the size of the
terminal to be set. Use the resize command to initialize terminal size
on login if we are running on a serial terminal.
