feat: added JAW as wallet provider

[LeoFranklin015]

Added JAW (@jaw.id/core) as a wallet provider alongside ZeroDev, set as the new default. Same IWalletProvider
interface passkey-based smart accounts on Arbitrum Sepolia.

Setup

1. pnpm install
2. In packages/app/.env, set VITE_JAW_API_KEY= your-api-key
   Optional: VITE_JAW_PAYMASTER_URL.
3. In packages/app/src/hooks/use-auth.ts , set as new DEFAULT_PROVIDER = 'jaw'
4. pnpm dev:app

Test plan

• Register — click Register, enter username, accept passkey create prompt → lands on /dashboard with smart account
  address shown.
• Login — log out, click Login, pick the passkey from the OS picker → same address as before.
• Refresh — while logged in, refresh tab. No prompt; goes straight to /dashboard (JAW caches session).
• Send a tx

[0xkkkn]

Hey, thanks for the contribution! A few small things:

1. There's a drift between hooks/use-auth.ts ('zerodev') and stores/wallet-store.ts ('jaw') — could we keep them in sync? Ideally as a single shared constant so they can't diverge again.

2. On our side we'd like to keep ZeroDev as the default provider — it's a hard dependency for us due to existing technical agreements and some upcoming plans on that integration. JAW is a great addition as an alternative, but let's land it without flipping the default. 🙏

3. Could we also pin @jaw.id/core to a concrete version (e.g. ^0.2.5) instead of "latest"? With "latest", any lockfile regeneration (merge conflict, fresh clone, CI cache miss) pulls whatever's currently published, so builds stop being reproducible across builders forking this starter. And since the SDK is still on 0.x, a breaking change can land in a minor release and silently break things without any code change on our side.

Could you adjust the defaults to 'zerodev' and pin the version? Happy to merge once that's aligned.