Add ERC: ZK Presentation Interface for MTC

[YutaHoshino]

The following PR has been split. https://github.com/ethereum/ERCs/pull/1229

Summary MTC-ZK defines an optional, fixed Groth16-style ABI (proveMetric) to verify predicates only (e.g., score ≥ threshold) against MTC Core anchors—without revealing raw values.

Files: EIPS/eip-8036.md

Discussion: https://ethereum-magicians.org/t/erc-8036-zero-knowledge-presentation-interface-for-multitrust-credential-8035/25648

[eip-review-bot]

File ERCS/erc-8036.md

Requires 1 more reviewers from @g11tech, @samwilsn, @xinbenlv

[github-actions[bot]]

The commit ba2a8ea2cef090227bb85fd0658d0b911e3c3ff7 (as a parent of 70e62d7ca10dd167abdb94455b349e9d9d0863f0) contains errors. Please inspect the Run Summary for details.