fix(poll): structure

[joshuai96]

When using a screen reader the polls are not easily perceivable.

This is related to WCAG Success Criterion 1.3.1 Info and Relationships.

• Checkbox changes:
  The checkbox component now uses a given id, the name or a random id to link it's input to the label. This further optimizes the perception with assistive technologies.
• Packages update:
  The type packages missed the last update and using the useId hook failed linting.
• Poll:
  The question and answers were not grouped together logically enough for assistive technologies like a screen reader. Wrapping in a fieldset with a legend binds them together better instead of the ul element. The poll result is logically still an unordered list. The bind the labels and checkboxes together the pollId and index of the answers is used as id.

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[joshuai96]

Drafting to address unsuccessful checks