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/packages/docs-ui/src/components/Feedback/Solutions/index.tsx

@@ -2,7 +2,7 @@
 
 import React, { useEffect, useState } from "react"
 import { request } from "@octokit/request"
-import { Link } from "@/components/Link"
+import { LegacyLink } from "@/components"
 
 export type SolutionsProps = {
   feedback: boolean
@@ -69,9 +69,14 @@ export const Solutions = ({ feedback, message }: SolutionsProps) => {
           <ul>
             {possibleSolutions.map((solution) => (
               <li key={solution.url} className="mb-docs_0.5 last:mb-0">
-                <Link href={solution.html_url} target="_blank" rel="noreferrer">
+                {/* TODO replace with Link once we move away from Docusaurus */}
+                <LegacyLink
+                  href={solution.html_url}
+                  target="_blank"
+                  rel="noreferrer"
+                >
                   {solution.title}
-                </Link>
+                </LegacyLink>
               </li>
             ))}
           </ul>