docs: fix build errors + update medusa docs link (#8550)

* docs: update medusa docs link

* fix @medusajs/icon version

* fix user guide build

* fix build error

www/apps/resources/app/page.mdx

@@ -29,7 +29,7 @@ Explore Medusa's commerce modules, SDKs, configurations, recipes, and more.
 
 <Note title="Getting started?">
 
-Follow the [Medusa Book](https://medusa-docs-v2-git-docs-v2-medusajs.vercel.app) to become an advanced Medusa developer.
+Follow the [Medusa v2 Docs](!docs!) to become an advanced Medusa developer.
 
 </Note>
 
@@ -165,4 +165,4 @@ Follow the [Medusa Book](https://medusa-docs-v2-git-docs-v2-medusajs.vercel.app)
     href: "/nextjs-starter",
     showLinkIcon: false
   },
-]} />
+]} />

www/apps/resources/package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@mdx-js/loader": "^3.0.1",
     "@mdx-js/react": "^3.0.1",
-    "@medusajs/icons": "^1.2.0",
+    "@medusajs/icons": "preview",
     "@next/mdx": "^14.2.3",
     "clsx": "^2.1.0",
     "docs-ui": "*",