build: update npm install command to use --legacy-peer-deps

This change modifies the build scripts to use --legacy-peer-deps flag when installing npm dependencies to resolve potential peer dependency conflicts during the build process. The change is applied to both bash (build.sh) and batch (build.bat) build scripts.

frontend/node_modules/espree/espree.js

@@ -1,3 +1,5 @@
+/* eslint-disable jsdoc/no-multi-asterisks -- needed to preserve original formatting of licences */
+
 /**
  * @fileoverview Main Espree file that converts Acorn into Esprima output.
  *
@@ -55,6 +57,7 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+/* eslint-enable jsdoc/no-multi-asterisks -- needed to preserve original formatting of licences */
 
 import * as acorn from "acorn";
 import jsx from "acorn-jsx";
@@ -157,7 +160,7 @@ export const Syntax = (function() {
     }
 
     for (key in VisitorKeys) {
-        if (Object.hasOwn(VisitorKeys, key)) {
+        if (Object.hasOwnProperty.call(VisitorKeys, key)) {
             types[key] = key;
         }
     }