* make Clip accept an attribute name
This allows users to copy arbitrary attributes (e.g. username, notes,
URL) to the clipboard in addition to the password and TOTP values.
* update Clip manpage
* Add findAttributes to CLI utils
* Use case-insensitive search in Show command.
* Use case-insensitive search in Clip command.
Co-authored-by: louib <L0U13@protonmail.com>