chore(docs): added eslint to lint documentation code blocks (#2920)

* docs: added rule for code length

* chore: fixes based on vale errors

* changed to use eslint

* fixes using eslint

* added github action for documentation eslint

* changed allowed max-length

* fixed incorrect heading level

* removed comment

docs/content/add-plugins/s3.md

@@ -118,7 +118,7 @@ Finally, in `medusa-config.js`, add to the `plugins` array the following new ite
 
 ```jsx title=medusa-config.js
 const plugins = [
-  //...
+  // ...
   {
     resolve: `medusa-file-s3`,
     options: {
@@ -129,7 +129,7 @@ const plugins = [
         secret_access_key: process.env.S3_SECRET_ACCESS_KEY,
     },
   },
-];
+]
 ```
 
 ### Add AWS Configurations
@@ -140,7 +140,7 @@ For example, you can pass the `region`, `access_key_id` and `secret_access_key`
 
 ```jsx title=medusa-config.js
 const plugins = [
-  //...
+  // ...
   {
     resolve: `medusa-file-s3`,
     options: {
@@ -150,10 +150,10 @@ const plugins = [
           region: process.env.S3_REGION,
           access_key_id: process.env.S3_ACCESS_KEY_ID,
           secret_access_key: process.env.S3_SECRET_ACCESS_KEY,
-        }
+        },
     },
   },
-];
+]
 ```
 
 Make sure to define `S3_REGION`, `S3_ACCESS_KEY_ID`, and `S3_SECRET_ACCESS_KEY` in your environment variables first.
@@ -198,14 +198,14 @@ In `next.config.js` add the following option in the exported object:
 ```jsx title=next.config.js
 const { withStoreConfig } = require("./store-config")
 
-//...
+// ...
 
 module.exports = withStoreConfig({
-  //...
+  // ...
   images: {
     domains: [
-      //...
-      "<BUCKET_NAME>.s3.amazonaws.com"
+      // ...
+      "<BUCKET_NAME>.s3.amazonaws.com",
     ],
   },
 })