docs: general fixes and improvements (#7918)

* docs improvements and changes

* updated module definition

* modules + dml changes

* fix build

* fix vale error

* fix lint errors

* fixes to stripe docs

* fix condition

* fix condition

* fix module defintion

* fix checkout

* disable UI action

* change oas preview action

* flatten provider module options

* fix lint errors

* add module link docs

* pr comments fixes

* fix vale error

* change node engine version

* links -> linkable

* add note about database name

* small fixes

* link fixes

* fix response code in api reference

* added migrations step

www/apps/resources/references/file/classes/file.AbstractFileProviderService/page.mdx

@@ -194,7 +194,7 @@ The File Module accepts one provider only.
 </Note>
 
 ```js title="medusa-config.js"
-const { Modules } = require("@medusajs/modules-sdk")
+import { Modules } from "@medusajs/utils"
 
 // ...