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/AiAssistant/index.tsx

@@ -11,7 +11,7 @@ import {
   SearchSuggestionType,
   SearchHitGroupName,
   Tooltip,
-  Link,
+  LegacyLink,
 } from "@/components"
 import { useAiAssistant, useSearch } from "@/providers"
 import { ArrowUturnLeft, XMarkMini } from "@medusajs/icons"
@@ -382,10 +382,14 @@ export const AiAssistant = () => {
           tooltipChildren={
             <>
               This site is protected by reCAPTCHA and the{" "}
-              <Link href="https://policies.google.com/privacy">
+              {/* TODO replace with Link once we move away from Docusaurus */}
+              <LegacyLink href="https://policies.google.com/privacy">
                 Google Privacy Policy
-              </Link>{" "}
-              and <Link href="https://policies.google.com/terms">ToS</Link>{" "}
+              </LegacyLink>{" "}
+              and{" "}
+              <LegacyLink href="https://policies.google.com/terms">
+                ToS
+              </LegacyLink>{" "}
               apply
             </>
           }