docs: update api-reference project for v2 (#7307)

* remove everything v1 and make v2 default

* move main v2 rewrites to book

* move rewrites to book + other fixes

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

@@ -3,41 +3,20 @@
 import { Toggle } from "docs-ui"
 import clsx from "clsx"
 import { usePathname } from "next/navigation"
-import { useVersion } from "../../providers/version"
 
 const VersionSwitcher = () => {
   const pathname = usePathname()
-  const { version } = 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>
+      <span className={clsx("text-medusa-fg-disabled")}>V1</span>
       <Toggle
-        checked={version === "2"}
-        onCheckedChange={(checked) => {
-          let newPath = pathname.replace("/v2", "")
-          if (checked) {
-            newPath += `/v2`
-          }
-
-          location.href = location.href.replace(pathname, newPath)
+        checked={true}
+        onCheckedChange={() => {
+          location.href = process.env.NEXT_PUBLIC_API_V1_URL + pathname
         }}
       />
-      <span
-        className={clsx(
-          version === "1" && "text-medusa-fg-disabled",
-          version === "2" && "text-medusa-fg-subtle"
-        )}
-      >
-        V2
-      </span>
+      <span className={clsx("text-medusa-fg-subtle")}>V2</span>
     </div>
   )
 }