bitwardenAttachment filename itemid
bitwardenAttachment returns a document from Bitwarden using the
Bitwarden CLI (bw). filename and itemid are passed to bw get
attachment $FILENAME --itemid $ITEMID and the output is returned.
The output from bw is cached so calling bitwardenAttachment multiple times
with the same filename and itemid will only invoke bw once.
Example
{{- bitwardenAttachment "$FILENAME" "$ITEMID" -}}