Next.js 16, React 19.2, Identities page, Invitations identities step, PNPM Catalogs (#381)

* Upgraded to Next.js 16
* Refactored code to comply with React 19.2 ESLint rules
* Refactored some useEffect usages with the new useEffectEvent
* Added Identities page and added second step to set up an identity after accepting an invitation
* Updated all dependencies
* Introduced PNPM catalogs for some frequently updated dependencies
* Bugs fixing and improvements

apps/dev-tool/next.config.ts

@@ -3,9 +3,7 @@ import type { NextConfig } from 'next';
 const nextConfig: NextConfig = {
   reactStrictMode: true,
   transpilePackages: ['@kit/ui', '@kit/shared'],
-  experimental: {
-    reactCompiler: true,
-  },
+  reactCompiler: true,
   devIndicators: {
     position: 'bottom-right',
   },