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/book/app/advanced-development/modules/options/page.mdx

@@ -80,7 +80,7 @@ The object that a module’s loaders receive as a parameter has an `options` pro
 
 For example:
 
-```ts title="src/modules/hello/loaders/hello-world.ts" highlights={[["11"], ["16"]]}
+```ts title="src/modules/hello/loaders/hello-world.ts" highlights={[["11"], ["12", "ModuleOptions", "The type of expected module options."], ["16"]]}
 import {
   LoaderOptions,
 } from "@medusajs/modules-sdk"