feat: add craft tags and community connections to directory and profiles

Update member directory and public profile APIs to include craftTags
and communityConnections with privacy-aware filtering. Directory now
uses predefined tags from the Tag model for filter bars and supports
craftTag/connectionTag query filters. Frontend shows craft tag pills
and cooperative topics with state labels, falling back to old
offering/lookingFor fields. Add Connections nav item.

app/components/AppNavigation.vue

@@ -173,6 +173,7 @@ const youItems = [
 const exploreItems = [
   { label: "Events", path: "/events" },
   { label: "Members", path: "/members" },
+  { label: "Connections", path: "/connections" },
   { label: "Wiki", path: "/wiki" },
   { label: "About", path: "/about" },
 ];