Please mention GNU xgettext in the README #163
Description
The README.md file, in section "Gettext Requirements", says: "You also need to ensure that you have the xtr string extraction command installed, which can be achieved using cargo install xtr."
GNU gettext version 0.24 and newer supports extracting strings from Rust source code via xgettext, see the announcement https://lists.gnu.org/archive/html/info-gnu/2025-02/msg00010.html. xgettext in fact has some advantages over xtr, see gettext-rs/gettext-rs#139 .
Therefore it would be useful to mention the use of xgettext as an alternative to xtr in the README.md, and to merge the pull request #116 .