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/eslint/lib/shared/string-utils.js

@@ -5,6 +5,12 @@
 
 "use strict";
 
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const Graphemer = require("graphemer").default;
+
 //------------------------------------------------------------------------------
 // Helpers
 //------------------------------------------------------------------------------
@@ -12,8 +18,8 @@
 // eslint-disable-next-line no-control-regex -- intentionally including control characters
 const ASCII_REGEX = /^[\u0000-\u007f]*$/u;
 
-/** @type {Intl.Segmenter | undefined} */
-let segmenter;
+/** @type {Graphemer | undefined} */
+let splitter;
 
 //------------------------------------------------------------------------------
 // Public Interface
@@ -25,10 +31,10 @@ let segmenter;
  * @returns {string} The converted string
  */
 function upperCaseFirst(string) {
-	if (string.length <= 1) {
-		return string.toUpperCase();
-	}
-	return string[0].toUpperCase() + string.slice(1);
+    if (string.length <= 1) {
+        return string.toUpperCase();
+    }
+    return string[0].toUpperCase() + string.slice(1);
 }
 
 /**
@@ -37,22 +43,18 @@ function upperCaseFirst(string) {
  * @returns {number} The number of graphemes in `value`.
  */
 function getGraphemeCount(value) {
-	if (ASCII_REGEX.test(value)) {
-		return value.length;
-	}
+    if (ASCII_REGEX.test(value)) {
+        return value.length;
+    }
 
-	segmenter ??= new Intl.Segmenter("en-US"); // en-US locale should be supported everywhere
-	let graphemeCount = 0;
+    if (!splitter) {
+        splitter = new Graphemer();
+    }
 
-	// eslint-disable-next-line no-unused-vars -- for-of needs a variable
-	for (const unused of segmenter.segment(value)) {
-		graphemeCount++;
-	}
-
-	return graphemeCount;
+    return splitter.countGraphemes(value);
 }
 
 module.exports = {
-	upperCaseFirst,
-	getGraphemeCount,
+    upperCaseFirst,
+    getGraphemeCount
 };