feat(OAS): sanitize circular reference for Redocly (#3198)

### What

Add OAS build step to patch known circular references that prevent Redocly from rendering the API documentation.

### Why

We've encountered crashing and loading issues with Redocly when the OAS contained circular references. We have been working around the limitation by omitting some known problematic $ref in our source OAS. We wish to move away from this strategy in order to always explicitly include $ref in our OAS.

### How

We are introducing a custom Redocly CLI plugin that will replace `$ref` by `type: object` base on a configurable set of instructions. These instructions can be modified in `docs-util/redocly/config.yaml`

We are adding a `redocly bundle` step in the current OAS build process in order to sanitize problematic circular references.

We updated the redocly-cli package version in order to ensure that plugins are supported.

### Test

We will use [Cart.payment](https://github.com/medusajs/medusa/blob/fd5c18515931aca7cb5d29530f5dd03ebaf7e07e/packages/medusa/src/models/cart.ts#L72-L74) to ensure that the new process is properly sanitizing.

* Run `yarn openapi:generate`
* Open `docs/api/store/components/schemas/Cart.yaml`
  * Expect the `payment` property to have been sanitized to `type: object`
* Run `yarn redocly preview-docs docs/api/store/openapi.yaml --config=docs-util/redocly/config.yaml`
* Visit http://127.0.0.1:8080/#tag/Cart/operation/GetCartsCart
  * In the response, expect cart.payment to not list the properties of the Payment schema.

docs-util/redocly/plugins/plugin.js

@@ -0,0 +1,14 @@
+const CircularPatch = require("./decorators/circular-patch")
+
+const id = "plugin"
+
+const decorators = {
+  oas3: {
+    "circular-patch": CircularPatch,
+  },
+}
+
+module.exports = {
+  id,
+  decorators,
+}