CCSAAS-2663: Get credential flow for ACCS REST API (phase 1)

[jeff-matthews]

Purpose of this pull request

This pull request (PR) implements the GetCredential component for the Adobe Commerce as a Cloud Service REST API.

It seeks to cover the simplified requirements for phase 1 implementation as discussed in #459.

Staging

Note

Requires VPN if remote for proper rendering.

https://developer-stage.adobe.com/commerce/webapi/reference/rest/saas/

TODOs

• As soon as we get template IDs from the Developer Platform team, we can update this PR and start testing.
• Redocly registry clean up:
  • Remove branch/PR validation
  • Remove hosted docs

whastnew
Enabled a workflow to allow users to get credentials to try the Adobe Commerce as a Cloud Service REST API directly from the reference documentation.

[jeff-matthews]

When I try local builds sing the frameSrc for the API spec, the credential block doesn't render. When I comment that out, the credential block does render. I guess that means the credential block only supports the <RedoclyAPIBlock> for the API reference.

[jeff-matthews]

As discussed, OpenAPI v3 is a requirement and we're stuck at v2 for ACCS. We will pursue implementation on the Catalog Data Ingestion REST API while we work with product and engineering to prioritize an upgrade for ACCS.