feat: consent card with custom onSubmit

[Benehiko]

Related Issue or Design Document

https://github.com/ory/elements/issues/110

Checklist

• [ ] I have read the contributing guidelines and signed the CLA.
• [ ] I have referenced an issue containing the design document if my change introduces a new feature.
• [ ] I have read the security policy.
• [ ] I confirm that this pull request does not address a security vulnerability. If this pull request addresses a security vulnerability, I confirm that I got green light (please contact security@ory.sh) from the maintainers to push the changes.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [ ] I have added necessary documentation within the code base (if appropriate).

Further comments

[davidspek]

Do the changes in this PR need testing?

[Benehiko]

yes, i haven't had time to complete it yet. It still requires a bit more e2e testing to make sure this works properly in the example nextjs application.