Add ERC: Splitting and Merging of NFTs

[nitin312]

When opening a pull request to submit a new EIP, please use the suggested template: https://github.com/ethereum/EIPs/blob/master/eip-template.md

We have a GitHub bot that automatically merges some PRs. It will merge yours immediately if certain criteria are met:

• The PR edits only existing draft PRs.
• The build passes.
• Your GitHub username or email address is listed in the 'author' header of all affected PRs, inside .
• If matching on email address, the email address is the one publicly listed on your GitHub profile.

[eip-review-bot]

File ERCS/erc-7891.md

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

[github-actions]

The commit 6d9e704 (as a parent of 9aab0bc) contains errors.
Please inspect the Run Summary for details.

[bomanaps]

You made a duplicate of the same proposal. One pull request per proposal. If you have any changes to include, update the same PR rather than opening multi pull requests for one EIP. #965 #963

[SamWilsn]

Please stop opening new pull requests and instead update the already existing pull request. Continued spam will result in a ban.