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/plugins/payment/stripe.mdx

@@ -119,13 +119,13 @@ STRIPE_WEBHOOK_SECRET=whsec_...
 
 ## Admin Setup
 
-This section will guide you through adding Stripe as a payment processor in a region using your Medusa admin dashboard.
+This section will guide you through adding Stripe as a payment processor in a region using your Medusa Admin dashboard.
 
 This step is required for you to be able to use Stripe as a payment processor in your storefront.
 
 ### Admin Prerequisites
 
-If you don’t have a Medusa admin installed, make sure to follow along with [the guide on how to install it](https://github.com/medusajs/admin#-quickstart) before continuing with this section.
+If you don’t have a Medusa Admin installed, make sure to follow along with [the guide on how to install it](https://github.com/medusajs/admin#-quickstart) before continuing with this section.
 
 ### Add Stripe to Regions