Patrick 1456056e8f feat(oas): new medusa-oas docs for Redocly and circular references (#3745) ...

## What

New `medusa-oas docs` to improve OAS compatibility with for Redocly API documentation viewer and handle deep circular references.

## Why

We wish to share the tooling we have been using to generate our public API documentation.

## How

* Move `/docs-utils/redocly` under `medusa-oas-cli` package.
* Move  some of the operations from `oas-github-ci/scripts/build-openapi.js` under the `medusa-oas docs` command.
* Improve DevX when dealing with circular references by outputting precise troubleshooting recommendations in the error message.
* Extract some common operations in utility methods.

## Tests

### Step 1
* Run `yarn install`
* Run `yarn build`
* Run `yarn openapi:generate --dry-run`
* Expect same behaviour as before where OAS is validated and circular references are checked.

### Step 2
* Run `yarn openapi:generate`
* Expect same behaviour as before where API documentation is generated in `/docs`

### Step 3
* Move to the `packages/oas/medusa-oas-cli`
* Run `yarn medusa-oas oas --type store --out-dir ~/tmp/oas` to generate the raw OAS file.
* Run `yarn medusa-oas docs --src-file ~/tmp/oas/store.oas.json --preview`
* Open url from the console output in a browser
* Expect a preview of the API documentation using Redocly.

### Step 4
* Run `yarn medusa-oas docs --src-file ~/tmp/oas/store.oas.json --out-dir ~/tmp/docs/store --clean --split`
* Expect a similiar output as `yarn openapi:generate`

### Step 5
* Run `yarn medusa-oas docs --src-file ~/tmp/oas/store.oas.json --out-dir ~/tmp/docs/store --clean --html`
* Expect `index.html` to have been created.
* Run `npx http-server ~/tmp/docs/store -p 8000`
* Open http://127.0.0.1:8000 in a browser.
* Expect a zero-dependency static rendering of the API documentation using Redocly.

### Step 6
* To emulate an unhandled circular reference, edit [packages/oas/medusa-oas-cli/redocly/redocly-config.yaml](https://github.com/medusajs/medusa/blob/d180f47e1609e74f46f72cdeef6265a654da3e7e/packages/oas/medusa-oas-cli/redocly/redocly-config.yaml#L9-L10) and comment out "Address: - Customer"
* Run `yarn medusa-oas docs --src-file ~/tmp/oas/store.oas.json --dry-run`
* Expect an error message with a hint on how to resolve the issue.
* Create a file `~/tmp/redocly-config.yaml` and paste in the recommendation from the error message.
* Run `yarn medusa-oas docs --src-file ~/tmp/oas/store.oas.json --dry-run --config ~/tmp/redocly-config.yaml` 
* Expect Dry run to succeed.

2023-04-12 17:16:15 +00:00

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