docs: prep for v2 documentation (#6710)

This PR includes documentation that preps for v2 docs (but doesn't introduce new docs).

_Note: The number of file changes in the PR is due to find-and-replace within the `references` which is unavoidable. Let me know if I should move it to another PR._

## Changes

- Change Medusa version in base OAS used for v2.
- Fix to docblock generator related to not catching all path parameters.
- Added typedoc plugin that generates ER Diagrams, which will be used specifically for data model references in commerce modules.
- Changed OAS tool to output references in `www/apps/api-reference/specs-v2` directory when the `--v2` option is used.
- Added a version switcher to the API reference to switch between V1 and V2. This switcher is enabled by an environment variable, so it won't be visible/usable at the moment.
- Upgraded docusaurus to v3.0.1
- Added new Vale rules to ensure correct spelling of Medusa Admin and module names.
- Added new components to the `docs-ui` package that will be used in future documentation changes.

www/apps/docs/content/js-client/overview.mdx

@@ -98,7 +98,7 @@ The client accepts the following options on initialization:
 | `maxRetries`        | `0`                       | The amount of times a request is retried.                 |
 | `baseUrl`           | `'http://localhost:9000'` | The url to which requests are made to.                    |
 | `apiKey`            | `''`                      | Optional API key used for authenticating admin requests.  |
-| `publishableApiKey` | `''`                      | Optional publishable API key used for storefront requests. You can create a publishable API key either using the [admin APIs](../development/publishable-api-keys/admin/manage-publishable-api-keys.mdx) or the [Medusa admin](../user-guide/settings/publishable-api-keys.mdx). |
+| `publishableApiKey` | `''`                      | Optional publishable API key used for storefront requests. You can create a publishable API key either using the [admin APIs](../development/publishable-api-keys/admin/manage-publishable-api-keys.mdx) or the [Medusa Admin](../user-guide/settings/publishable-api-keys.mdx). |
 | `customHeaders` | `{}`                      | Optional headers to attach to every request. |
 
 
@@ -268,7 +268,7 @@ You can learn more about publishable API keys and how to use them in [this docum
 
 ### Create a Publishable API Key
 
-You can create a publishable API key either using the [admin REST APIs](../development/publishable-api-keys/admin/manage-publishable-api-keys.mdx), or using the [Medusa admin dashboard](../user-guide/settings/publishable-api-keys.mdx).
+You can create a publishable API key either using the [admin REST APIs](../development/publishable-api-keys/admin/manage-publishable-api-keys.mdx), or using the [Medusa Admin dashboard](../user-guide/settings/publishable-api-keys.mdx).
 
 ### Use a Publishable API Key