feat(lanes): surface child worktrees on a lane card + detect Superpowers skills

Adopting the main repo as its own lane now gets stage detection
(cwd matches, same as any other lane), and its card lists every
managed-worktree lane provisioned from it with a jump-to link.
Also add the two missing Skill-tool detect rules (implement, ship)
so detection covers all four Superpowers workflow phases, not just
plan/review.

client/src/pages/Workspace.tsx

@@ -1079,6 +1079,10 @@ export function Workspace() {
             <LaneCard
               lane={currentLane}
               onAction={(a, b) => handleLaneAction(currentLane.id, a, b)}
+              childWorktrees={lanes.filter(
+                (l) => l.source_repo === currentLane.cwd && l.id !== currentLane.id
+              )}
+              onSelectLane={setSelectedLaneId}
             />
           </div>
           <div className="mb-3">