chore: upgrade to ENSv2 (Universal Resolver)

[Dhaiwat10]

Hey! I'm Dhaiwat from the DevRel team at ENS Labs. We're working on getting active repos and libraries across the ecosystem ready for ENSv2.

Summary

Upgrades this repo to be ENSv2-ready by routing ENS resolution through the Universal Resolver (0xeeeeeeee14d718c2b47d9923deab1335e144eeee) instead of the legacy ENS Registry.

Changes

• Upgrade viem ^2.29.0 → ^2.48.11 in packages/arb-token-bridge-ui/package.json

Why

The current path returns stale results for names managed by the new Universal Resolver. For example, ur.integration-tests.eth should resolve to 0x2222222222222222222222222222222222222222; legacy resolution returns incorrect values.

More details: https://docs.ens.domains/web/ensv2-readiness

Verification

• ur.integration-tests.eth → 0x2222222222222222222222222222222222222222

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