Feat: Ability to use extensions in winbars and tabline

[sleeptightAnsiC]

Requested feature

I kindly ask for a feature that would allow for using extensions inside of winbars and tabline.
Currently, extensions can be turned on/off globally and it only works for statusline.
Additional configuration capability could allow for enabling extensions locally, e.g. only for specific winbar.\

Motivation

Lack of such ability is undesired because lots of things in lualine.nvim already work for these two cases, so extensions could also do. I myself use lualine for displaying most of components in the tabline, so in my case I pretty much cannot use extensions at all.