docs: second round of polishing (#8724)

* docs: second round of polishing

* fix overflowing width

www/apps/api-reference/app/globals.css

@@ -43,10 +43,6 @@
     @apply bg-medusa-bg-highlight;
   }
 
-  pre *::selection {
-    @apply !bg-medusa-contrast-bg-highlight;
-  }
-
   body[data-modal="opened"] {
     @apply !overflow-hidden;
   }

www/apps/resources/sidebar.mjs

@@ -281,7 +281,7 @@ export const sidebar = sidebarAttachHrefCommonOptions([
       },
       {
         type: "category",
-        title: "Currency",
+        title: "Currency Module",
         initialOpen: false,
         children: [
           {
@@ -348,7 +348,7 @@ export const sidebar = sidebarAttachHrefCommonOptions([
       },
       {
         type: "category",
-        title: "Customer",
+        title: "Customer Module",
         initialOpen: false,
         children: [
           {