feat: implement nfc tap to share claim link

[SharifIbrahimDev]

Closes #98

What does this PR do?

This PR introduces an experimental feature using the Web NFC API to allow users to write a Bridgelet claim URL directly to a physical NFC tag. This feature is intended for in-person payment disbursements (e.g., events, community distributions), enabling recipients to tap the tag and claim funds without relying on email delivery.

Description

• Web NFC Hook: Created useNfc (frontend/hooks/use-nfc.ts), a React hook that checks for window.NDEFReader support and handles writing URL records to NFC tags.
• Send Flow Integration: Updated ConfirmStep (frontend/components/send-form/steps/confirm-step.tsx) to display a "Write to NFC Tag" button upon successful payment generation (if the browser supports Web NFC).
• NFC Evaluation Document: Drafted docs/experiments/nfc-experiment.md detailing the implementation, its constraints (e.g., currently restricted to Android Chrome), security considerations, and potential future use-cases.
• Latent Type Fixes: Addressed missing MSW module imports and updated the Freighter API getPublicKey to getAddress to ensure clean builds.

Acceptance Criteria met

• Implementation complete
• Tests passing
• Docs updated