feat: include crededentials in graphql client

[marcoklein]

This PR contains:

• A NEW FEATURE

Describe the problem you have without this PR

This is a feature for #3439

This Pull Request adds the option to pass the credential parameter to the underlying GraphQL client. Without it the application will not send any cookies to other domains since the credentials option is same-origin per default. See the spec documentation at https://fetch.spec.whatwg.org/#concept-request-credentials-mode

Todos

• Tests
• Documentation
• Typings
• Changelog

How should I update the changelog?

[pubkey]

Code looks good but there is nothing about the setCredentials() in the docs changes.
I will add teh changelog afterwards, you do not have to care about that.

[marcoklein]

What do you mean exactly? I updated the docs-src/replication-graphql.md to include some documentation but when I run npm run docs:build I get lots of changes in the docs folder so I thought you run that separately.

EDIT: saw that I had a typo in there. Updated the docs now.

[pubkey]

Great, merged.
Thank you for your work.