[feat] Create `<rh-agenda>` element

[marionnegp]

Latest Design (updated 3/17)

Design Doc

latest XD - WIP

Description

The agenda component/pattern would be an updated version of the agenda in FTS.

Acceptance Criteria

• Design done
• Development done

Other Resources

Notes from Trello:

• XD link: https://xd.adobe.com/view/d2e0c019-6aa5-4bc6-aaed-3aa59e0cee69-87b3/specs/
• Collapsed view vs. expanded? https://www.redhat.com/en/events/webinar/develop-deploy-deliver-continuously#agenda vs. https://www.redhat.com/en/summit/agenda/agenda-at-a-glance (Dan)
• For the first link, wondering if a series of Accordions can be used instead. For the second link, maybe the Alert pattern can be tweaked or a new Card style with a left border can be created. (@coreyvickery)
• what's missing from that example is the time beside the "accordion" piece: https://webrh-patternkit.int.open.paas.redhat.com/schema/daily_agenda (Dan)

Additional examples from event design team:

• Summit Boston 2022
• Summit Connect: Raleigh 2021
• Summit Connect: Germany 2021
• Test example 1
• Test example 2

[marionnegp]

Notes from a meeting with event designers (5/24/22):

• Summit Boston 2022
  • No set color key but some sort of color coding is good to have
  • Drupal has a limit of ten entries in one disclosure component.
  • Omitting time in disclosure would just leave empty space on left
  • Sometimes entries will pull speaker name automatically, which requires extra proofreading for name duplication.
• About current XD link:
  • This XD isn’t a layout that’s really used. More of a working file to make agenda look consistent with design system.
  • Can’t add links or add paragraph tags for speakers/session descriptions in the current FTS agenda pattern, which can be limiting
  • Needs to be flexible enough to work for single-day and multi-day events. Multi-day events may have an additional agenda builder.
  • Pop up feature is good for session abstracts or speaker info
  • Having a title next to the speaker name is helpful.

[marionnegp]

Feedback from Adam Thornburg for implementation in Drupal:

This is more a note for the development but the current abstract and speaker info section in drupal are not flexible. You can't add bulleted list, line breaks, links, etc. I would want this section to be WYSIWYG editor.