login: Attach & execute hooks script in sshd container

[karaimin]

In our project, we need to start an additional SSHD server as a daemon to handle specific authentication use cases. The current implementation doesn't allow extending the initialization process.

I've prepared a 2 PRs that address this via 2 different approaches:

• feat(login): Attach & execute hooks script in sshd container #544 - Inject hook scripts into the SSHD entrypoint.
• feat(login): Run supervisord in sshd container entrypoint #551 - Replace the SSHD entrypoint with supervisord to enable custom process configurations.

...would appreciate it if you could take a look.