[18.0][ADD] resource_booking_google_meet: default bookings to Google Meet videocall

[dnplkndll]

Summary

Adds resource_booking_google_meet — a small glue module that ensures the
google_calendar integration auto-generates a unique Google Meet URL for each
resource.booking confirmation.

Problem: google_calendar._google_values() only adds conferenceData (which
triggers Meet URL generation) when both videocall_location and location are
falsy on the event:

if not self.google_id and not self.videocall_location and not self.location:
    values['conferenceData'] = {'createRequest': {'requestId': uuid4().hex}}

If the booking type has a physical address (location), the condition fails even when
videocall_location is empty, so no Meet URL is ever generated.

Fix: Override _prepare_meeting_vals() to clear location from the meeting vals
when the booking type has no custom videocall_location. This ensures the
google_calendar sync always requests conferencing for remote-only bookings.

When the booking type does have a videocall_location (e.g. a static Zoom personal
room), the module leaves everything unchanged.

Checklist

• Module follows OCA conventions (pyproject.toml, readme/, pre-commit clean)
• author includes Odoo Community Association (OCA)
• license: AGPL-3
• maintainers: ["dnplkndll"]
• Tests (next PR — needs a google_calendar mock)