[Request for feature] Support tab-bar and tab-line

[ksqsf]

Currently, it looks like this:

[yavuzakyuz]

Same in my machine. I can take a look if you can provide more details on your expectation

[ksqsf]

@yavuzakyuz I can't say I have very concrete expectations, but IMO doom-monokai's tab-bar is good-looking enough. (It can be improved though: the "close" and "new tab" buttons look a little weird.)

(First line = Tab-bar, Second line = Tab-line)