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/api/base-specs/route.ts

@@ -2,11 +2,15 @@ import { NextResponse } from "next/server"
 import path from "path"
 import OpenAPIParser from "@readme/openapi-parser"
 import getPathsOfTag from "@/utils/get-paths-of-tag"
-import type { ExpandedDocument } from "@/types/openapi"
+import type { ExpandedDocument, Version } from "@/types/openapi"
 
 export async function GET(request: Request) {
   const { searchParams } = new URL(request.url)
   const area = searchParams.get("area")
+  const version =
+    process.env.NEXT_PUBLIC_VERSIONING === "true"
+      ? (searchParams.get("version") as Version) || "1"
+      : "1"
   const expand = searchParams.get("expand")
   if (area !== "admin" && area !== "store") {
     return NextResponse.json(
@@ -20,7 +24,11 @@ export async function GET(request: Request) {
     )
   }
   const baseSpecs = (await OpenAPIParser.parse(
-    path.join(process.cwd(), `specs/${area}/openapi.yaml`)
+    path.join(
+      process.cwd(),
+      version === "1" ? "specs" : "specs-v2",
+      `${area}/openapi.yaml`
+    )
   )) as ExpandedDocument
 
   if (expand) {