🎩 What? Why?

This PR allows to add polls to online meetings.

As an admin:

• admins can create a questionnaire with two types of questsions (single option and multiple option) in the admin meeting UI. To access to it there's a new option in the meetings list
• lot of work from decidim-forms has been reused, also as many classes as possible has been re-used, but as there were some critical differences we've had to declare new classes (Question, Answer, ....)
• when the admin visits the live event (in the public web) she can see a button Administrate that allows to change the state of the questions:
  • from unpublished to published, so the question is visible for attendees to respond. When questions are replied she can see the number of replies and a preview of the results
  • from published to closed, in which case the results are displayed to users, that can't reply anymore
• also admins can export questions and answers in common formats (CSV, JSON...) from the admin UI, to allow them to view data once the meeting has finished

As a user:

• when a user visits a live meeting there's a new access CTA
• in this new layout users have a button Questions that opens a sidebar
• the sidebar reloads automatically using a basic polling (based on comments polling). The polling has a timeout of 5 seconds, it can be adjusted
• users can reply and see results of questsions, depending on its state

Notice that the current page to answer the poll only contains the poll, but there's a reserved space for the videoconference iframe that will be filled up in #7716, #7724 and other related issues.

📌 Related Issues

• Fixes Have polls in Meetings #7723 (epic) and it's related issues:
  • Fixes Implement answers in polls in meetings  #7985
  • Fixes Implement public admin for questions in polls in meetings #7979
  • Fixes Implement admin interfaces to create questionnaries for polls in meetings #7963
  • Fixes Polls in meetings: Research tech #7895

Testing

As an admin:

• create a questionnaire, add different types of questions, add max limit of chosen options
• validate questions can be updated
• validate questions can't be updated once there are answers
• validate questions and answers can be exported
• validate can administrate questions in the live event page: change state, preview results, close questions

As a user:

• validate can see published and closed questiosn in the live event page
• validate questions are updated via polling
• validate can answer questions
• validate can see replies in closed questions

📋 Checklist

🚨 Please review the guidelines for contributing to this repository.

• ❓ CONSIDER adding a unit test if your PR resolves an issue.
• ✔️ DO check open PR's to avoid duplicates.
• ✔️ DO keep pull requests small so they can be easily reviewed.
• ✔️ DO build locally before pushing.
• ✔️ DO make sure tests pass.
• ✔️ DO make sure any new changes are documented in docs/.
• ✔️ DO add and modify seeds if necessary.
• ✔️ DO add CHANGELOG upgrade notes if required.
• ✔️ DO add to GraphQL API if there are new public fields.
• ✔️ DO add link to MetaDecidim if it's a new feature.
• ❌AVOID breaking the continuous integration build.
• ❌AVOID making significant changes to the overall architecture.

📷 Screenshots

Admin UI:

List questions for admins:

List questions for users:

♥️ Thank you!