Feature Request: Bulk Add Items to Collections

Hi Vaultwarden team,

First of all, thank you for developing and maintaining such a fantastic tool!
I really appreciate all the effort you put into it.

I wanted to ask if it would be possible to add a feature that allows users to bulk add items such as logins to collections.

Additionally, it would be very helpful to have the option to shift-select an entire list of items, making it easier to multiple add items at once.

These features would greatly improve the efficiency of managing larger amounts of data.

Thank you in advance for considering this!