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/i18n/locales/en/lanes.json

@@ -29,6 +29,8 @@
   "addLaneSetupProfile": "Profile",
   "addLaneSetupTitle": "Setup",
   "addLaneTitleLabel": "Title",
+  "worktrees.heading_one": "{{count}} worktree",
+  "worktrees.heading_other": "{{count}} worktrees",
   "addLaneTitlePlaceholder": "Optional",
   "autoStage": "auto: {{stage}}",
   "cardId": "Lane {{id}}",