[FEAT] Implement EAS accessory contract

[ronerlih]

Tasks

• [ ] Spike a plan (schema & flow-resolver) for EAS implementation
• [ ] Schema contract
• [ ] resolver contract (OPT, might be a separate ticket)

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[johnx25bd]

I want to support this strongly this week to achieve the goal of shipping an MVP for EAS location attestations to testnet, with front ends.

Ron, I want to understand exactly what you mean by "accessory contract", why it's necessary etc.