sw bibliography, local copy: add document model & UNO API

The idea is that a bibliography entry (field) can have not only an URL
(which might be unavailable due to lack of network connectivity,
paywall, etc) but also a local copy, which is also a URL.

The local copy doesn't replace the original URL. The local copy is
stored part of the document, since it may be a relative URL, e.g. ODT +
several PDFs copied around in the same directory.

This commit just starts this feature, up to the extent that read and
write of the new property works.

Change-Id: I3c4df2be3a1f3b02a87c097f8a0630951def09d0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/119322
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions