fix(cli): custom resume for vim.ui.select

[phanen]

Custom vim.ui.select may have a custom "resume":

• :lua require('snacks.picker').resume()
• :Telescope resume
• :FzfLua resume

But all of them don't work correctly now: :Gitsigns -> do select(ok) -> "resume" -> do select again(nop or fail)

The reason is "resume" may call on_choice(), which is also hijacked by async.lua.

[phanen]

I'm not sure is there any other way to fix, await-ed function cannot call cb twice

a.run(function()
  print(a.await(function(cb)
    cb(1)
    cb('this will error')
  end))
end):raise_on_error()

[lewis6991]

Why is vim.ui.select calling resume twice?

[phanen]

sorry not calling twice in await function

the ref is actually passed outside of await function, then the picker's resume function call it again.

anyway cb should no be called again so i just remove await here