docs: editing and general fixes of medusa's learning resources (#7261)

* docs: editing and general fixes of medusa's learning resources

* fix build script

* update ui dependency

* fix build

* adjust next.js steps

www/apps/resources/app/troubleshooting/_sections/other/s3-acl.mdx

@@ -1,4 +1,4 @@
-If you're using the [S3 Plugin](../../../plugins/storage/s3/page.mdx) and, when you upload an image, you receive the following error on your Medusa backend:
+If you're using the S3 Plugin and, when you upload an image, you receive the following error on your Medusa backend:
 
 ```bash noReport
 AccessControlListNotSupported: The bucket does not allow ACLs

www/apps/resources/app/troubleshooting/page.mdx

@@ -6,4 +6,10 @@ export const metadata = {
 
 # {metadata.title}
 
+<Note type="soon">
+
+The following troubleshooting guides were created for Medusa v1 and might not be useful for Medusa v2.
+
+</Note>
+
 <ChildDocs />

www/apps/resources/app/troubleshooting/payment-provider-missing/page.mdx

@@ -1,30 +0,0 @@
-export const metadata = {
-  title: `Payment Provider not showing in checkout`,
-}
-
-# {metadata.title}
-
-You add payment providers to your Medusa instance by adding them as plugins in `medusa-config.js`:
-
-```js title="medusa-config.js"
-const plugins = [
-  // ...
-  {
-    resolve: `medusa-payment-stripe`,
-    options: {
-      api_key: STRIPE_API_KEY,
-      webhook_secret: STRIPE_WEBHOOK_SECRET,
-    },
-  },
-]
-```
-
-And installing them with your favourite package manager:
-
-```bash npm2yarn
-npm install medusa-payment-stripe
-```
-
-However, to also show them as part of your checkout flow you need to add them to your regions.
-
-Then, refer to this user guide to learn how to enable the [payment provider in a region](!user-guide!/settings/regions/providers).