Keep history of last selected item on find files

[otavioschwanck]

Its like a mix between old_files only_cwd=true with find_files.

On Emacs, it keeps the last selected files at top:

Would be awesome to have this on Telescope for find_files

[fdschmidt93]

Some thoughts:

• Not sure if that should be built-in or whether we rather should have a recipe for that
• We should provide an ergonomic interface for doing something like that I suppose
• Something like this would be already possible, how-to:
  • telescope-file-browser.nvim example can be found here
  • Relevant implementation in telescope.nvim is here

Maybe this can be made more ergonomically, s.t. users can wrap what they want around that more easily (MRU, etc.). In other words, I suppose ideally the original feature request becomes another telescope-extension as I'd say it is not "telescope-core".

I'd say PR welcome for improving ergonomics :)

[thw26]

Just linking shared issues as these all appear related: see #2348.