Auto hide after certain duration

[spywhere]

It would be nice to support an auto-hide feature where there is no activity (no scrolling) for certain amount of time passed.

This can be achieved through vim.defer_fn and libuv.timer_stop.

Here's my setup for this feature through Xuyuanp/scrollbar.nvim plugin.

For now, I can make a workaround by using :ScrollViewDisable and :ScrollViewEnable, but I don't want to fiddle around with autocmd events, hence submit an issue here.

[AlexvZyl]

@dstein64 This would be a nice addition.