Add ERC: NFT Recursive Synthesis Asset Standard

[OneHundredMiles]

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[eip-review-bot]

File ERCS/erc-4242.md

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

[github-actions[bot]]

The commit c09a6dc297536368f38f871eca7020ce72cdb527 (as a parent of 5f9d7d4023af8a719884a528e6a908db5992bb71) contains errors. Please inspect the Run Summary for details.

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This pull request was closed due to inactivity. If you are still pursuing it, feel free to reopen it and respond to any feedback or request a review in a comment.