feat: implement XML validation for Google Shopping schema compliance and add validation script

package-lock.json

@@ -58,7 +58,9 @@
         "webpack-bundle-analyzer": "^4.10.2",
         "webpack-cli": "^6.0.1",
         "webpack-dev-server": "^5.2.2",
-        "webpack-node-externals": "^3.0.0"
+        "webpack-node-externals": "^3.0.0",
+        "xmldom": "^0.6.0",
+        "xpath": "^0.0.34"
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -12747,6 +12749,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/xmldom": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/xmldom/-/xmldom-0.6.0.tgz",
+      "integrity": "sha512-iAcin401y58LckRZ0TkI4k0VSM1Qg0KGSc3i8rU+xrxe19A/BN1zHyVSJY7uoutVlaTSzYyk/v5AmkewAP7jtg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/xmlhttprequest-ssl": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-2.1.2.tgz",
@@ -12755,6 +12767,16 @@
         "node": ">=0.4.0"
       }
     },
+    "node_modules/xpath": {
+      "version": "0.0.34",
+      "resolved": "https://registry.npmjs.org/xpath/-/xpath-0.0.34.tgz",
+      "integrity": "sha512-FxF6+rkr1rNSQrhUNYrAFJpRXNzlDoMxeXN5qI84939ylEv3qqPFKa85Oxr6tDaJKqwW6KKyo2v26TSv3k6LeA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6.0"
+      }
+    },
     "node_modules/xtend": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-2.1.2.tgz",