chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/packages/docs-ui/src/components/ExpandableNotice/index.tsx

@@ -1,5 +1,5 @@
 import React from "react"
-import { Badge, LegacyLink, Tooltip } from "@/components"
+import { Badge, Link, Tooltip } from "@/components"
 
 export type ExpandableNoticeProps = {
   type: "request" | "method"
@@ -20,11 +20,8 @@ export const ExpandableNotice = ({
         <>
           If this {type} accepts an <code>expand</code>{" "}
           {type === "request" ? "parameter" : "property or option"},
-          {/* TODO replace with Link once we move away from Docusaurus */}
-          <br /> this field can be <LegacyLink href={link}>
-            expanded
-          </LegacyLink>{" "}
-          into an object.
+          <br /> this field can be <Link href={link}>expanded</Link> into an
+          object.
         </>
       }
       clickable