Messenger delegation prototype

[Gudahtt]

Explanation

This is a prototype for https://github.com/MetaMask/decisions/pull/53

References

See https://github.com/MetaMask/decisions/pull/53

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• [ ] I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes