chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/app/troubleshooting/errors-installing-cli/page.mdx

@@ -0,0 +1,27 @@
+import PermissionErrorsSection from '../_sections/cli-installation-errors/permission-errors.mdx'
+import PowershellErrorSection from '../_sections/cli-installation-errors/powershell-error.mdx'
+import YarnError from '../_sections/cli-installation-errors/yarn-error.mdx'
+
+export const metadata = {
+  title: `Resolve Errors Installing Medusa CLI`,
+}
+
+# {metadata.title}
+
+In this document, you can find solutions to some common problems that occur when installing Medusa’s CLI Tool.
+
+## NPM Error: EACCES Permissions Errors
+
+<PermissionErrorsSection />
+
+---
+
+## Powershell Error: command not found: medusa
+
+<PowershellErrorSection />
+
+---
+
+## Yarn Error: command not found: medusa
+
+<YarnError />