feat: update webhook documentation with more grant types

[sgal]

Related Issue or Design Document

Documentation update for ory/hydra#3427.

This change adds guides for adding/updating custom token claims via webhook feature for the following set of grant types:

• authorization_code
• client_credentials
• refresh_token
• urn:ietf:params:oauth:client-assertion-type:jwt-bearer

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 approval (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 the necessary documentation within the code base (if appropriate).

Further comments

[sgal]

Updated docs page at Preview - https://docs-rnke3r89h-ory.vercel.app/docs/hydra/guides/custom-token-claims

Current live docs page - https://www.ory.sh/docs/hydra/guides/claims-at-refresh

[sgal]

@tomekpapiernik Thanks for the review. I reverted the document ID and the sidebar changes and fixed the writing. Please have a look.

[tomekpapiernik]

Thanks for updating your PR @sgal ! I took the liberty of editing this a bit more. Most important change - I updated the Ory CLI to use --add instead of --replace, as the keys you want to work with aren't present in the oauth2 config from the get-go - they must be added. The --replace command doesn't do that. I'll approve this PR and it can be merged along with the code PR you opened.

[sgal]

@tomekpapiernik Thanks a lot for the review and fixes 👏

[sgal]

@aeneasr The PR in Hydra is already merged, shall we merge this as well?

[hperl]

LGTM, thanks for your contribution @sgal!