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/app/globals.css

@@ -0,0 +1,53 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer base {
+  h1 {
+    @apply text-h1 mb-1;
+  }
+  
+  h2 {
+    @apply text-h2 mb-1;
+  }
+  
+  h3 {
+    @apply text-h3 mb-0.5;
+  }
+  
+  h4 {
+    @apply text-h4 mb-0.5;
+  }
+  
+  h1, h2, h3, h4 {
+    @apply text-medusa-fg-base;
+  }
+  
+  hr {
+    @apply h-[1px] w-full border-0 bg-medusa-border-base my-2;
+  }
+  
+  p, ul, ol {
+    @apply mb-1.5;
+  }
+
+  html {
+    -webkit-font-smoothing: antialiased;
+  }
+
+  body {
+    @apply overflow-x-hidden;
+  }
+
+  *::selection {
+    @apply bg-medusa-bg-highlight;
+  }
+
+  pre *::selection {
+    @apply !bg-medusa-code-text-highlight;
+  }
+
+  body[data-modal="opened"] {
+    @apply !overflow-hidden;
+  }
+}