Calendar-Timeline (vertical)

This is a (multiple allowed):

• [] bug
• enhancement
• feature-discussion (RFC)

Please add the ability to view the CalendarTimeline vertically instead of horizontally.

For example, I want to use something like:

<div class="timeline timeline-vertical">

to view the "Calendar Timeline" vertical instead of horizontal.

There are users prefering to scroll vertically instead of horizontally.
By the way, scrolling vertically is more common than scrolling horizontally.

For example, something like this:

Start by locating the CalendarTimeline component and its existing horizontal rendering and styles. Review how the timeline-vertical class could select an alternate layout, then verify that vertical scrolling and the current horizontal view both work as intended.