Add support for Tab Groups and fix Pinned Tabs

It's been long years since the other tickets found on this forum got any attention so it seems to me that it's about time to bring new insights and start new conversation.

11 years https://tabsoutliner.userecho.com/communities/1/topics/73-should-to-remember-if-a-tab-was-pinned 
8 years https://tabsoutliner.userecho.com/communities/1/topics/135-bug-when-working-with-pinned-tabs 
3 years https://tabsoutliner.userecho.com/communities/1/topics/489-can-you-add-chrome-tab-groups-support-save-tree-with-tab-groups-title-and-load-after-open
2 years https://tabsoutliner.userecho.com/communities/1/topics/497-support-tab-groups-in-chrome-beta 


Grouped tabs don't restore in groups. They don't show as groups in Tab Outliner UI tree either.

Only some tabs get restored as pinned. They don't show as pinned in Tab Outliner UI tree either.

There are valid use cases for both standard chrome features, that are thoroughly mentioned in the linked tickets, so it seems that there is no argument against also adding them to the extension.