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/api-reference/components/VersionSwitcher/index.tsx

@@ -0,0 +1,36 @@
+"use client"
+
+import { Toggle } from "docs-ui"
+import { useVersion } from "../../providers/version"
+import clsx from "clsx"
+
+const VersionSwitcher = () => {
+  const { version, changeVersion } = useVersion()
+
+  return (
+    <div className="flex gap-0.5 justify-center items-center">
+      <span
+        className={clsx(
+          version === "1" && "text-medusa-fg-subtle",
+          version === "2" && "text-medusa-fg-disabled"
+        )}
+      >
+        V1
+      </span>
+      <Toggle
+        checked={version === "2"}
+        onCheckedChange={(checked) => changeVersion(checked ? "2" : "1")}
+      />
+      <span
+        className={clsx(
+          version === "1" && "text-medusa-fg-disabled",
+          version === "2" && "text-medusa-fg-subtle"
+        )}
+      >
+        V2
+      </span>
+    </div>
+  )
+}
+
+export default VersionSwitcher