Add ERC: Decentralized Identity Verification (DID)

[64anushka]

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[eip-review-bot]

File ERCS/erc-7734.md

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

[github-actions[bot]]

The commit 5999900fd4d3ed8c077ae5869a621b4091698e2c (as a parent of 4499ff4b8571c401a3b0908463f39133ed58f77c) contains errors. Please inspect the Run Summary for details.