Add ID Token to TokenSet

[kenkoooo]

📋 Changes

In v3, the ID Token was exposed in the session. In v4, although the ID Token claim is stored in SessionData, the actual ID Token is no longer exposed. This pull request reintroduces the ID Token to the session.

📎 References

(None)

🎯 Testing

A unit test has been added to verify that the ID Token provided by the authorization server is correctly stored in the session store.

[jiesia]

This is also very useful to me, can you help merge the code?

[kenkoooo]

@frederikprijck @tusharpandey13 @nandan-bhat @arpit-jn @gyaneshgouraw-okta @developerkunal
Hi! Would you mind reviewing this PR? Thank you!

[tusharpandey13]

hi @kenkoooo , this PR looks fine.
In order to support id_token field, #1975 is up which will allow session cookie to be > 4KB in size.
I see that your commit is not signed. We require signed commits.
In order to move forward, I will make a new branch in nextjs-auth0 from your commit and sign it using my gpg-key, hence approving this change. In this way, you will retain your contribution history.
Otherwise, you can also sign your commit and do a force push on this branch so that we can merge it directly.

Thanks, we will close this asap.

[tusharpandey13]

Closing this as a duplicate PR has been opened with your contributions in #1978