Create API/service to build VTIMEZONE components for events

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Is your feature request related to a problem? Please describe.

As a Nextcloud developer I may have to create a VEVENT object in the backend. I might have a timezone id available, but for a full fledged VEVENT component there is no easy way to create the VTIMEZONE spec.

Describe the solution you'd like

Create an API/service to build such VTIMEZONE components for a given timezone ID.

https://github.com/nextcloud/calendar/pull/5339 added a simple approach for this for Calendar. For a holistic solution we might have to ship timezone data.

Describe alternatives you've considered

N/a

Additional context

• Sabre discussion https://github.com/sabre-io/vobject/issues/248

Start by reviewing nextcloud/calendar pull request #5339 and the linked Sabre vobject discussion to understand the existing approach and constraints. The work is done when the server has a defined API/service that builds VTIMEZONE components from a timezone ID, including an agreed approach for shipping timezone data.