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/LearningPath/Steps/Actions/index.tsx

@@ -0,0 +1,58 @@
+import React from "react"
+import { useLearningPath } from "../../../../providers/LearningPath"
+import { Button } from "docs-ui"
+import { ArrowDownLeftMini, ArrowDownMini } from "@medusajs/icons"
+
+type LearningPathStepActionsType = {
+  onFinish?: () => void
+  onClose?: () => void
+  setCollapsed: React.Dispatch<React.SetStateAction<boolean>>
+} & React.AllHTMLAttributes<HTMLDivElement>
+
+export const LearningPathStepActions = ({
+  onFinish,
+  onClose,
+  setCollapsed,
+}: LearningPathStepActionsType) => {
+  const { hasNextStep, nextStep, endPath } = useLearningPath()
+
+  const handleFinish = () => {
+    if (onFinish) {
+      onFinish()
+    } else {
+      endPath()
+    }
+  }
+
+  return (
+    <div className="flex p-docs_1 justify-between items-center">
+      <div>
+        <Button
+          onClick={() => setCollapsed(true)}
+          variant="secondary"
+          className="!text-medusa-fg-subtle !p-[6px]"
+        >
+          <ArrowDownLeftMini className="flip-y hidden md:inline" />
+          <ArrowDownMini className="inline md:hidden" />
+        </Button>
+      </div>
+      <div className="flex gap-docs_0.5 items-center">
+        {hasNextStep() && (
+          <>
+            <Button onClick={onClose} variant="secondary">
+              Close
+            </Button>
+            <Button onClick={nextStep} variant="primary">
+              Next
+            </Button>
+          </>
+        )}
+        {!hasNextStep() && (
+          <Button onClick={handleFinish} variant="primary">
+            Finish
+          </Button>
+        )}
+      </div>
+    </div>
+  )
+}