Allow Tab to be dragged and dropped into a buffer

[titoBouzout]

Currently a Tab can only be dropped on the tab bar. It would be nice if a Tab can be dropped in a buffer, and that tab to be added to that the tabbar of that buffer(for when the layout differs). This would simplify tab moving between editors located in different screens.

I suggested to extend the drop target height of the tabbar to include the height of the buffer, but maybe a new drop target could be added to the buffer.

It is possible that this feature request is incompatible with this https://github.com/sublimehq/sublime_text/issues/6387 as dragging to a zone will be complicated if the buffer magnets the tab into it. To drag to a fancyzone one will have to avoid the tabbar and the buffer. So honestly I am undecided about this, I found fancy zones to be very helpful to quickly organize windows

[deathaxe]

IIRC, it was already announced that extending drop targets to e.g. buffer is not a priority due to various technical difficulties.

[titoBouzout]

Quoting from this comment https://github.com/sublimehq/sublime_text/issues/6308#issuecomment-2095112661

Reopening for that issue. The rest I'd ask you to report separately, though extending the drop target to the whole buffer is unlikely to ever happen for various reasons.

I'm unsure if the comment refers to extending the height of the tabbar drop target, or adding a new drop target on the buffer.