refactor: rename shopLayoutData to storefrontLayoutData

Align Alpine.js base component naming with storefront terminology.
Updated across all storefront JS, templates, and documentation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/customers/templates/customers/storefront/addresses.html

@@ -318,7 +318,7 @@
 <script>
 function addressesPage() {
     return {
-        ...shopLayoutData(),
+        ...storefrontLayoutData(),
 
         // State
         loading: true,

app/modules/customers/templates/customers/storefront/dashboard.html

@@ -163,7 +163,7 @@
 <script>
 function accountDashboard() {
     return {
-        ...shopLayoutData(),
+        ...storefrontLayoutData(),
         showLogoutModal: false,
 
         confirmLogout() {

app/modules/customers/templates/customers/storefront/profile.html

@@ -288,7 +288,7 @@
 <script>
 function shopProfilePage() {
     return {
-        ...shopLayoutData(),
+        ...storefrontLayoutData(),
 
         // State
         profile: null,
@@ -508,7 +508,7 @@ function shopProfilePage() {
             }
         },
 
-        // formatPrice is inherited from shopLayoutData() via spread operator
+        // formatPrice is inherited from storefrontLayoutData() via spread operator
 
         formatDate(dateStr) {
             if (!dateStr) return '-';