### 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](fd5c185159/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.
