[ADD][14.0] resource_booking_simultaneous_human

[carmenbianca]

When a resource of type human is scheduled for a booking, they remain simultaneously available for other bookings.

The purpose of this module is bookings for events where a worker can split their attention between multiple attendants.

Internal task: https://gestion.coopiteasy.be/web#id=9879&action=475&active_id=434&model=project.task&view_type=form&menu_id=536

[carmenbianca]

I think the broken pre-commit test is unrelated to these changes.

[github-actions[bot]]

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[github-actions[bot]]

There hasn't been any activity on this pull request in the past 4 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days. If you want this PR to never become stale, please ask a PSC member to apply the "no stale" label.