docs: revise commerce modules overview pages (#10738)

* revise API Key Module overview

* revise auth module

* support ref sidebar items

* remove examples

* revise cart module

* revise currency

* revise customer module

* revise fulfillment module

* revise inventory module

* revise order module

* revise payment

* revise pricing module

* revise product module

* revise promotion module

* revise region module

* revise sales channel module

* revise stock location module

* revise store module

* revise tax module

* revise user module

* lint content + fix snippets

www/packages/build-scripts/src/utils/parse-tags.ts

@@ -27,14 +27,11 @@ const getIntersectionTags = (tags: string): Tag => {
     .map((tagName) => getTagItems(tagName))
     .filter((tag) => tag !== undefined) as Tag[]
 
-  if (!tagsToIntersect.length) {
+  if (tagsToIntersect.length < 2) {
+    // if there are less than 2 tags to intersect, return an empty array
     return []
   }
 
-  if (tagsToIntersect.length === 1) {
-    return tagsToIntersect[0]
-  }
-
   return tagsToIntersect[0].filter((tagItem) => {
     return tagsToIntersect
       .slice(1)