[Enhancement] Support for Tab Groups

[irvinm]

Abstract

It looks like Firefox might get support for this in the not so distant future. It might be good to think about how TST might try to represent both trees and groups together based on how Chrome currently does it.

https://discourse.mozilla.org/t/any-chance-tab-groups-will-ever-come/121265/10

In Chrome, it looks like they store the groupId as part of the Tab object and they have a separate chrome.tabGroups API to interact with the groups.

• https://developer.chrome.com/docs/extensions/reference/api/tabs
• https://developer.chrome.com/docs/extensions/reference/api/tabGroups

Expected result

This is actually a good question and might an interesting design discussion.

The reality is that a Tab Group are really just the root of a collapsible tree, so this might just become a version of the existing "Group Tab".