fix(build): resolve AppImage version from manifest

[albertonoys]

Read version and commit directly from manifest.yaml for AppImage targets in Makefile and CI workflows. This prevents builds from defaulting to 'v0.0.0 (commit unknown)' when git commands fail or lack a git tree.

Fixes #1596

[arturict]

For AppImage manifest resolution, include reproduction for stale cache behavior when version changes.

[albertonoys]

1. When build-appimage.yaml is triggered, the job runs inside an AppImage build container with a shallow checkout
2. Before this fix, the Configure CMake step did not pass -DVICINAE_GIT_TAG or -DVICINAE_GIT_COMMIT_HASH
3. CMake fell back to git describe --tags inside the container, which failed, setting v0.0.0 unknown
   (The same happened locally with make appimage from a source tree without tags)
4. vicinae versionin the resulting AppImage reports v0.0.0 (commit unknown) regardless of the actual release version, and the update (install) script always sees a newer version

With this change, the Makefile and CI workflows read TAG and COMMIT from manifest.yaml (kept up to date by scripts/bump_version.sh) and forward them to cmake explicitly, bypassing the git fallback.