feat: add Team billing tier

Widens the tier enum from free/pro to free/pro/team and every
"free" | "pro" cast that assumed exactly two tiers (~30 call sites:
every AI route's withAiQuota/checkAndIncrementTierLimit call, admin
user/invite management, upload quota checks, OpenAPI schemas). Team
sits above Pro with genuinely unlimited recipes/public-recipes (the
-1 sentinel, which Pro doesn't actually use — Pro uses large finite
numbers instead) and a higher AI-call/storage cap. Seeded via
db:seed, editable afterward from Admin > Tiers.

role (user/moderator/admin — permissions) and tier (free/pro/team —
billing limits) stay separate concepts, as they already were; this
does not touch role-based permissions.

Requires migration 0043 to run against a live DB — not applied in
this sandbox (no Docker here); run `pnpm db:migrate` then `pnpm db:seed`.

v0.44.0

apps/web/app/admin/users/[id]/page.tsx

@@ -25,6 +25,7 @@ const ROLE_COLORS = {
 const TIER_COLORS = {
   free: "secondary",
   pro: "default",
+  team: "default",
 } as const;
 
 export default async function AdminUserDetailPage({ params }: PageProps) {

apps/web/app/admin/users/page.tsx

@@ -24,6 +24,7 @@ const ROLE_COLORS = {
 const TIER_COLORS = {
   free: "secondary",
   pro: "default",
+  team: "default",
 } as const;
 
 export default async function AdminUsersPage({ searchParams }: PageProps) {