chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/vale/styles/docs/FirstPerson.yml

@@ -2,8 +2,9 @@ extends: existence
 message: "Avoid using first person (such as '%s')"
 link: https://medusajs.notion.site/Style-Guide-Docs-fad86dd1c5f84b48b145e959f36628e0#9f0dc7c440b841d3bfcb006df12c2652
 ignorecase: true
-level: error
+level: warning
 nonword: true
+scope: sentence
 tokens:
   - (?:^|\s)I\s
   - (?:^|\s)I,\s