feat(wallet): add Ethereum Sepolia Testnet configuration

[nattb8]

Hi👋, please ensure the PR title follows the below standards:

• PR is titled with conventional commit style naming: type(scope): message. For example: feat(passport): my new feature
• If you have introduced modification that necessitates immediate adjustments by this SDK's users to their applications, clients, or integrations to avert disruptions to existing features or functionalities, add a ! after the type(scope), for example feat(passport)!: my new breaking feature

Summary

• Add Ethereum Sepolia testnet configuration
• Update Arbitrum Sandbox environment to point to Ethereum Sepolia

ID-4279

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 17c8117

Command	Status	Duration	Result
nx affected -t build,lint,test	✅ Succeeded	3m 29s	View ↗
nx run-many -p @imtbl/sdk,@imtbl/checkout-widge...	✅ Succeeded	1m 29s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-02-02 03:12:56 UTC