Feature Request: Add support of weekly sessions

[Vlad-Bukatin]

Reason: Both our broker integration want weekly sessions and when we specify the daily schedule in hot fix config, the other side didn't reset it sequence. So for now we just enabled: reset on logon, which means that we rely on reconciliation process more, but generally it is not a great way to do it.

I saw the settings already can be provided and, as far as I understand, the only changes that needs to be done are in session_schedule.rs regarding session schedule.

I would start looking into it as soon as possible (probably tomorrow or early next week) and will raise a PR later

[davidsteiner]

Sounds good. Yeah, this is just a gap in the implementation as we've never needed it. It should be fairly straightforward to implement. Thanks!