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/linter/code-path-analysis/id-generator.js

@@ -17,28 +17,29 @@
  * A generator for unique ids.
  */
 class IdGenerator {
-	/**
-	 * @param {string} prefix Optional. A prefix of generated ids.
-	 */
-	constructor(prefix) {
-		this.prefix = String(prefix);
-		this.n = 0;
-	}
 
-	/**
-	 * Generates id.
-	 * @returns {string} A generated id.
-	 */
-	next() {
-		this.n = (1 + this.n) | 0;
+    /**
+     * @param {string} prefix Optional. A prefix of generated ids.
+     */
+    constructor(prefix) {
+        this.prefix = String(prefix);
+        this.n = 0;
+    }
 
-		/* c8 ignore start */
-		if (this.n < 0) {
-			this.n = 1;
-		} /* c8 ignore stop */
+    /**
+     * Generates id.
+     * @returns {string} A generated id.
+     */
+    next() {
+        this.n = 1 + this.n | 0;
 
-		return this.prefix + this.n;
-	}
+        /* c8 ignore start */
+        if (this.n < 0) {
+            this.n = 1;
+        }/* c8 ignore stop */
+
+        return this.prefix + this.n;
+    }
 }
 
 module.exports = IdGenerator;