Add ERC7739 and ERC7739Utils

[ernestognw]

Follow up from #5242 (must be reviewed first) and smaller version of #5182

This PR includes the following primitives:

• ERC7739Utils: A wrapped EIP-712 approach based on @frangio's and @Vectorized's work
• ERC7739Signer: An ERC1271 abstract contract that implements ERC7739Utils

Both of these will be required for the Account contracts

PR Checklist

• [x] Tests
• [x] Documentation
• [x] Changeset entry (run npx changeset add)

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 8a33b8008e3fbf0121725177c0f33a476ecfc05e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
openzeppelin-solidity	Minor

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[ernestognw]

Most of this work is inspired in ERC-7739 although I couldn't find an official reference to an ERC. We can update if needed

[Amxx]

The diff is completelly bugged. Changing base doesn't reset it

[Amxx]

IMO this should be in the go in the community repo, with the account work. I feels very new, and weither we want it or not depends on the account design (which I would also put in community repo)

[Amxx]

Code an tests are making good progress, but the underlying ERC is still subject to a lot of discussion.

Consequently, I don't think we should include that in 5.2. I'd rather wait for to see how the ERC discussion evolve and target a release of this code in 5.3