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/api.js

@@ -9,11 +9,11 @@
 // Requirements
 //-----------------------------------------------------------------------------
 
-const { ESLint, shouldUseFlatConfig } = require("./eslint/eslint");
-const { LegacyESLint } = require("./eslint/legacy-eslint");
+const { ESLint, FlatESLint } = require("./eslint");
+const { shouldUseFlatConfig } = require("./eslint/flat-eslint");
 const { Linter } = require("./linter");
 const { RuleTester } = require("./rule-tester");
-const { SourceCode } = require("./languages/js/source-code");
+const { SourceCode } = require("./source-code");
 
 //-----------------------------------------------------------------------------
 // Functions
@@ -23,18 +23,22 @@ const { SourceCode } = require("./languages/js/source-code");
  * Loads the correct ESLint constructor given the options.
  * @param {Object} [options] The options object
  * @param {boolean} [options.useFlatConfig] Whether or not to use a flat config
+ * @param {string} [options.cwd] The current working directory
  * @returns {Promise<ESLint|LegacyESLint>} The ESLint constructor
  */
-async function loadESLint({ useFlatConfig } = {}) {
-	/*
-	 * Note: The v8.x version of this function also accepted a `cwd` option, but
-	 * it is not used in this implementation so we silently ignore it.
-	 */
+async function loadESLint({ useFlatConfig, cwd = process.cwd() } = {}) {
 
-	const shouldESLintUseFlatConfig =
-		useFlatConfig ?? (await shouldUseFlatConfig());
+    /*
+     * Note: The v9.x version of this function doesn't have a cwd option
+     * because it's not used. It's only used in the v8.x version of this
+     * function.
+     */
 
-	return shouldESLintUseFlatConfig ? ESLint : LegacyESLint;
+    const shouldESLintUseFlatConfig = typeof useFlatConfig === "boolean"
+        ? useFlatConfig
+        : await shouldUseFlatConfig({ cwd });
+
+    return shouldESLintUseFlatConfig ? FlatESLint : ESLint;
 }
 
 //-----------------------------------------------------------------------------
@@ -42,9 +46,9 @@ async function loadESLint({ useFlatConfig } = {}) {
 //-----------------------------------------------------------------------------
 
 module.exports = {
-	Linter,
-	loadESLint,
-	ESLint,
-	RuleTester,
-	SourceCode,
+    Linter,
+    loadESLint,
+    ESLint,
+    RuleTester,
+    SourceCode
 };