This PR refactors what is remaining of HTML table API to divs.
It is mainly about the body and aggregate footer.
Because a `position: sticky` creates a stacking context, and because a
div wrapping other divs prevents those children divs from being sticky,
it has been found that removing the wrapping container of both header
and footer allows us to have all z-index in the same stacking context
and create the right experience.
Though the fine-tuning of z-index will be done in another PR.
There are many fixes left that will be addressed very soon in subsequent
PRs.
This PR focuses on bringing a functional table both with and without
RecordGroups. (Check Task views for that)
This PR introduces the usage of record fields in the manipulation of
table columns and board fields.
Since all of the actual system relies on states like tableColumns,
recordIndexFieldDefinitions and the likes, it was required to implement
temporary utils that modifies those states in parallel of the new
generic currentRecordFields, to keep a working product.
With this PR though, currentRecordFields becomes the single source of
truth that gets saved to DB, and the remaining work is just to make the
switch with this new state on all components that are plugged to
tableColumns and the like.
This will be done in another PR.
