feat(esupports.hop): Add tab drop as option for open_mode

[devansh08]

This adds :tab drop as an option for opening a file when clicking a file link. Tab drop as an option would be helpful to avoid opening a file a new tab, when it has already been open somewhere else.

IMO, this could be a replacement for the tabnew option itself, as tab drop will open a new tab normally if the same file is already not open. But it can be kept as a separate option as well. Also IMO, never bad to have multiple options :)

Do let me know your thoughts on this. If this looks good and needs any documenting, happy to work on that as well.

Thanks!

[benlubas]

Nice qol change.

It doesn't work currently, after that's fixed, you can rebase off of main (there was a documentation PR merged just now) and document the keybind with the others.

[devansh08]

@benlubas Fixed the mentioned issue and added docs.
I accidentally broke my git while trying to rebase, so had to commit my changes again. My bad!

Let me know if the docs part is good. Could not think of any better keybind using CR, so went with C-t. Let me know if you have any better ideas for that.

Thanks!

[devansh08]

I've just added another similar option that uses :drop instead. This works similar to tab-drop but would be useful for a buffer focused workflow (to which I have recently switched over :)). So cases where you have the destination already open in a split, it would just navigate to that instead of opening the destination in the current buffer (what default hop does today).

Let me know your thoughts. Thanks!

[benlubas]

Docs look good, but we can't override <C-d> that's a default vim bind.