* fix(uninstall): stop deleting files in the caller's directory
The curl uninstall command runs uninstall.sh from $PWD, and the script
treated that directory as a source checkout. It deleted venv, build, dist,
and Python bytecode there, then reported success.
Those paths are removed only when uninstall.sh itself lives in a Vocalinux
checkout, and only inside that checkout.
Fixes#897
* fix(uninstall): keep dev metadata and drop the false cleanup error
Tests put a pgrep and kill stub first on PATH, so they cannot signal a
Vocalinux process that is already running. egg-info cleanup stays under
src/ and the checkout root, and the bytecode walk prunes .venv. Artifact
cleanup runs before the curl clone is deleted, so an uninstall from
~/.local/share/vocalinux-install no longer prints an error and then success.
