Adds checks.<system>.vm-test-typecheck-<name> for hive-squid, swarm-archive, agent-ephemeral-rootfs, full-setup and wg-hive: ty and ruff F over nixpkgs' test-script prelude, the machine hints from the node names, and the script text. Node configs are never evaluated. vm-test-typecheck-control passes only when ty rejects a known type error.
Every docs directory moves under 1-getting-started, 2-handbook,
4-implementation or 5-project; the options reference (section 3) comes from
the website and has no directory here. trust-boundary stays whole under the
handbook for now. web-ui, swarm and tools split between handbook and
implementation, and the command-line references move to
2-handbook/reference. Links, path references in code and nix, and the docs
index follow the moves; no page content changes.
