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/Link/index.tsx

@@ -1,15 +1,22 @@
 import React from "react"
+import NextLink from "next/link"
+import type { LinkProps as NextLinkProps } from "next/link"
 import clsx from "clsx"
 
 export type LinkProps = {
   href?: string
   children?: React.ReactNode
   className?: string
-} & React.AllHTMLAttributes<HTMLAnchorElement>
+  target?: string
+  rel?: string
+} & Partial<NextLinkProps>
 
 export const Link = ({ href, children, className, ...rest }: LinkProps) => {
+  if (href?.replace(/#.*$/, "").endsWith("page.mdx")) {
+    href = href.replace("/page.mdx", "")
+  }
   return (
-    <a
+    <NextLink
       href={href || ""}
       {...rest}
       className={clsx(
@@ -18,6 +25,6 @@ export const Link = ({ href, children, className, ...rest }: LinkProps) => {
       )}
     >
       {children}
-    </a>
+    </NextLink>
   )
 }