apt purge - require simulate first

apt purge X can cascade through transitive dependencies and remove core platform packages. Block uninspected purges; require the user to first run apt purge --simulate <pkg> and review the REMOVING: block.

When it fires#

On any apt purge or apt-get purge invocation that is not preceded by apt purge --simulate <same args> within the current shell session (heuristic: look for a recent matching --simulate invocation in shell history; if not present, BLOCK).

Override#

nimblegate git --force-yes --reason="reviewed simulate output" apt purge ...