docs: added examples page (#9587)

- Added an examples page with examples of all different concepts in Medusa. We'll probably add more examples with time as we see the need for them.
- Small fixes in different pages.

Preview: https://resources-docs-ocb5uyp0o-medusajs.vercel.app/v2/resources/examples

www/apps/book/app/advanced-development/modules/container/page.mdx

@@ -55,7 +55,7 @@ For example:
 ```ts highlights={[["9"]]}
 import {
   LoaderOptions,
-} from "@medusajs/framework/modules-sdk"
+} from "@medusajs/framework/types"
 import { 
   ContainerRegistrationKeys
 } from "@medusajs/framework/utils"