feat: Team id in slack oidc

[trobinpl]

I did name the property in the Claims struct Team, although I can see it being called something more generic like OrganizationId since Team may be a specific Slack term, but some generic organization seems like something that will be present in many other OAuth providers.

Closes #1408

Related issue

#1408

Proposed changes

Reasoning behind this change described in the related issue. Basically it's a small change to include the team ID user belongs to in the Slack OIDC provider response so it's usable information in the hooks

Checklist

• I have read the contributing guidelines.
• 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 or changed the documentation.

Further comments

[CLAassistant]

All committers have signed the CLA.

[aeneasr]

Thank you very much for your contribution to the documentation! Due to the way Docusaurus versioning works, you need to make the changes in two locations:

• docs/versioned_docs/version-v{version}/path/to/file
• docs/docs/path/to/file

Without making them in both locations, the changes will most likely be lost when releasing another version. Thank you! :)

[trobinpl]

@aeneasr I've included the same documentation change in both locations you've mentioned 👍

[aeneasr]

Great, thank you!

[aeneasr]

Awesome, thank you! 🎉 Your contribution makes Ory better :)