Add an end-to-end check that runs `zit help` and asserts every member of the dispatched Verb enum is listed as a command, keyed off the enum itself rather than a hand-copied list. A verb wired into the dispatcher without a help line now fails the build instead of shipping undiscoverable.

The match is anchored on the command column, so a name that appears only inside another verb's description — "sync" in serve's line, "stat" within "status" — cannot satisfy it; a dropped command entry is caught by name.

The shipped help already names all verbs, so this changes no output; it pins that state against future drift. closed check-in: 64b9a0ee71 user: dmestas tags: p5a-help