Add new `connection` endpoints

[daffron]

SDK you're using (please complete the following information):

• Version 4.33.0

Is your feature request related to a problem? Please describe.
New endpoints for managing connections have been released.
https://developer.xero.com/documentation/guides/oauth2/tenants/#check-the-tenants-youre-authorised-to-access

Describe the solution you'd like
These should be accessible via the SDK methods

Describe alternatives you've considered
N/A

Additional context
Im happy to raise a PR for this, just unsure what API to put this under, appStoreApi?

[github-actions]

PETOSS-273

[github-actions]

Thanks for raising an issue, a ticket has been created to track your request

[SandonAhoy]

Doesn't XeroClient.revokeToken(), XeroClient.disconnect(connectionId) and XeroClient.updateTenants(boolean) handle all these?