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/Pagination/index.tsx

@@ -0,0 +1,33 @@
+"use client"
+
+import React from "react"
+import { usePagination } from "../../providers"
+import { Card } from "../Card"
+import { ChevronLeft, ChevronRight } from "@medusajs/icons"
+
+export const Pagination = () => {
+  const { previousPage, nextPage } = usePagination()
+
+  return (
+    <div className="flex justify-between">
+      {previousPage && (
+        <Card
+          title={previousPage.title}
+          startIcon={<ChevronLeft />}
+          showLinkIcon={false}
+          href={previousPage.link}
+          className="max-w-[45%] ml-0 mr-auto"
+        />
+      )}
+      {nextPage && (
+        <Card
+          title={nextPage.title}
+          endIcon={<ChevronRight />}
+          showLinkIcon={false}
+          href={nextPage.link}
+          className="max-w-[45%] mr-0 ml-auto"
+        />
+      )}
+    </div>
+  )
+}