docs: updated marketplace recipe + added example (#8061)

- Moved recipes into its own section of the learning resources
- Updated the marketplace recipe overview
- Added an example implementation of the marketplace recipe

Closes DOCS-791

www/apps/resources/generated/files-map.mjs

@@ -731,6 +731,10 @@ export const filesMap = [
     "filePath": "/www/apps/resources/app/recipes/integrate-ecommerce-stack/page.mdx",
     "pathname": "/recipes/integrate-ecommerce-stack"
   },
+  {
+    "filePath": "/www/apps/resources/app/recipes/marketplace/examples/vendors/page.mdx",
+    "pathname": "/recipes/marketplace/examples/vendors"
+  },
   {
     "filePath": "/www/apps/resources/app/recipes/marketplace/page.mdx",
     "pathname": "/recipes/marketplace"
@@ -747,6 +751,10 @@ export const filesMap = [
     "filePath": "/www/apps/resources/app/recipes/oms/page.mdx",
     "pathname": "/recipes/oms"
   },
+  {
+    "filePath": "/www/apps/resources/app/recipes/page.mdx",
+    "pathname": "/recipes"
+  },
   {
     "filePath": "/www/apps/resources/app/recipes/personalized-products/page.mdx",
     "pathname": "/recipes/personalized-products"