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

apps/web/package.json

@@ -56,7 +56,7 @@
     "@marsidev/react-turnstile": "^1.3.1",
     "@nosecone/next": "1.0.0-beta.12",
     "@radix-ui/react-icons": "^1.3.2",
-    "@supabase/supabase-js": "2.57.4",
+    "@supabase/supabase-js": "2.58.0",
     "@tanstack/react-query": "5.90.2",
     "@tanstack/react-table": "^8.21.3",
     "date-fns": "^4.1.0",
@@ -67,7 +67,7 @@
     "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",
     "recharts": "2.15.3",
     "tailwind-merge": "^3.3.1",
     "zod": "^3.25.74"
@@ -79,13 +79,13 @@
     "@next/bundle-analyzer": "15.5.4",
     "@tailwindcss/postcss": "^4.1.13",
     "@types/node": "^24.5.2",
-    "@types/react": "19.1.13",
+    "@types/react": "19.1.15",
     "@types/react-dom": "19.1.9",
     "babel-plugin-react-compiler": "19.1.0-rc.3",
     "cssnano": "^7.1.1",
     "pino-pretty": "13.0.0",
     "prettier": "^3.6.2",
-    "supabase": "2.45.5",
+    "supabase": "2.47.2",
     "tailwindcss": "4.1.13",
     "tailwindcss-animate": "^1.0.7",
     "typescript": "^5.9.2"