feat: added npm2yarn package (#1347)

docs/content/troubleshooting/missing-payment-providers.md

@@ -19,9 +19,7 @@ const plugins = [
 
 And installing them through your favourite package manager:
 
-```bash
-yarn add medusa-payment-stripe
-# or
+```bash npm2yarn
 npm install medusa-payment-stripe
 ```
 

docs/content/troubleshooting/transaction-error-in-checkout.md

@@ -34,4 +34,8 @@ module.exports = {
 }
 ```
 
-> When changing from SQLite to Postgres, you should seed the database again using: `yarn seed`
+> When changing from SQLite to Postgres, you should seed the database again using:
+
+```bash npm2yarn
+npm run seed
+```