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/ThemeImage/index.tsx

@@ -0,0 +1,27 @@
+"use client"
+
+import React from "react"
+import { useColorMode } from "@/providers"
+
+export type ThemeImageProps = {
+  light: string
+  dark?: string
+  alt?: string
+} & React.AllHTMLAttributes<HTMLImageElement>
+
+export const ThemeImage = ({
+  light,
+  dark,
+  alt = "",
+  ...props
+}: ThemeImageProps) => {
+  const { colorMode } = useColorMode()
+
+  return (
+    <img
+      alt={alt}
+      src={colorMode === "light" ? light : dark || light}
+      {...props}
+    />
+  )
+}