Allow spliting terminals

[JacobsonGal]

Hi!
I think it will be a great feature to add,
currently, you have all the features needed besides that one,
it could work like the splitTerminals in restoreTerminals,

I'll be happy to hear what do you think about it,
Thanks for the amazing extension! 🙏

[alextegelid]

This can probably be done by programmatically calling Terminal: Join terminals after starting the terminals. I get around by manually running that command right after opening the workspace.

[JacobsonGal]

@alextegelid Thanks!
Could you explain to me how can I join 8 terminals tabs into 4 joined ones?

[alextegelid]

I'm not sure how you'd go about doing that. I meant that it can probably be done by the extension programatically. I have an idea and began working on a PR yesterday. However, I've never worked with the vscode API or extension development before so I'm not making any promises 😊

[teded32]

Duplicate of #9