Feature Policies API + Invitations Policies (#375)

- Added Feature Policy API: a declarative system to enable/disable/modify default behavior in the SaaS kit
- Team invitation policies with pre-checks using the Feature Policy API: Invite Members dialog now shows loading, errors, and clear reasons when invitations are blocked
- Version bump to 2.16.0 and widespread dependency updates (Supabase, React types, react-i18next, etc.).
- Added comprehensive docs for the new policy system and orchestrators.
- Subscription cancellations now trigger immediate invoicing explicitly

packages/features/team-accounts/package.json

@@ -12,7 +12,10 @@
     "./api": "./src/server/api.ts",
     "./components": "./src/components/index.ts",
     "./hooks/*": "./src/hooks/*.ts",
-    "./webhooks": "./src/server/services/webhooks/index.ts"
+    "./webhooks": "./src/server/services/webhooks/index.ts",
+    "./policies": "./src/server/policies/index.ts",
+    "./policies/orchestrator": "./src/server/policies/orchestrator.ts",
+    "./services/account-invitations.service": "./src/server/services/account-invitations.service.ts"
   },
   "dependencies": {
     "nanoid": "^5.1.6"
@@ -27,15 +30,16 @@
     "@kit/monitoring": "workspace:*",
     "@kit/next": "workspace:*",
     "@kit/otp": "workspace:*",
+    "@kit/policies": "workspace:*",
     "@kit/prettier-config": "workspace:*",
     "@kit/shared": "workspace:*",
     "@kit/supabase": "workspace:*",
     "@kit/tsconfig": "workspace:*",
     "@kit/ui": "workspace:*",
-    "@supabase/supabase-js": "2.57.4",
+    "@supabase/supabase-js": "2.58.0",
     "@tanstack/react-query": "5.90.2",
     "@tanstack/react-table": "^8.21.3",
-    "@types/react": "19.1.13",
+    "@types/react": "19.1.15",
     "@types/react-dom": "19.1.9",
     "class-variance-authority": "^0.7.1",
     "date-fns": "^4.1.0",
@@ -44,7 +48,7 @@
     "react": "19.1.1",
     "react-dom": "19.1.1",
     "react-hook-form": "^7.63.0",
-    "react-i18next": "^15.7.3",
+    "react-i18next": "^16.0.0",
     "zod": "^3.25.74"
   },
   "prettier": "@kit/prettier-config",