[ Aurélien COUDERC ]
* Point upstream source to invent git repo.
* Switch to debian/watch format version 5.
* New upstream release (26.04.0).
* Update build-deps and deps with the info from cmake.
* Bump Standards-Version to 4.7.4, no change required.
* Drop Rules-Requires-Root: no, not needed anymore since trixie.
* Drop Priority: optional, not needed anymore since dpkg 1.22.13.