fix(governance): restore the 8 governance jobs stripped in #393

#393 reduced governance-reusable.yml from 9 jobs to 2 (only staleness +
hypatia-baseline), but branch-protection across the estate still requires
the named governance contexts -> permanent phantom deadlock on every repo.

Restores: Language/package anti-pattern policy, Guix primary/Nix fallback
policy, Security policy checks, Code quality + docs, Well-Known (RFC 9116
+ RSR), Workflow security linter, Trusted-base reduction policy, Licence
consistency. Keeps the newer workflow-staleness + hypatia-baseline jobs.
Stale actions/checkout v6.0.3 pins bumped to v7.0.0. actionlint clean.

These contexts were already required-but-not-emitted (all repos blocked);
re-emitting them can only unblock compliant repos and surface real drift.

Author: hyperpolymath