- Add Forgejo repository setup to test workflow for libostree packages
- Install libostree-dev and libostree-1-1 from Forgejo registry
- Add all missing Debian build dependencies: debhelper-compat, dh-cargo, cargo, rustc
- Add system library dependencies: libcurl4-gnutls-dev, libfuse3-dev, libsoup-3.0-dev
- Add documentation dependencies: gobject-introspection, gtk-doc-tools, docbook-xml, etc.
- Update todo.md to reflect completed main goal and next steps
This ensures the test workflow has all the same dependencies as the main workflow
and should now pass both cargo build and dpkg-buildpackage steps.