Feature: Schedule Meetings for a specific date and time

[dfun90]

Mattermost Version
5.38.2

Plugin Version
2.0.0

Describe the issue
As of right now you can only start normal meetings using the plugin. In certain situations you would like to schedule a meeting beforehand to a specific date and time. For this you could easily include a toggle "scheduled meeting" when creating a meeting using the plugin where you can specify the date, time and duration of the scheduled meeting.
Ideally the plugin would also remind the channel it is starting soon, like an hour or so before the meeting is supposed to start.

Additional context
In the docs of Jitsi is a section where they talk about enabling and using the reservation system with which this should be possible to achieve: https://jitsi.github.io/handbook/docs/devops-guide/reservation