migrated from npm to yarn in frontend

frontend/.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{js,json,yml}]
+charset = utf-8
+indent_style = space
+indent_size = 2

frontend/.gitattributes

@@ -0,0 +1,4 @@
+/.yarn/**            linguist-vendored
+/.yarn/releases/*    binary
+/.yarn/plugins/**/*  binary
+/.pnp.*              binary linguist-generated

frontend/.vscode/extensions.json

@@ -0,0 +1,6 @@
+{
+  "recommendations": [
+    "arcanis.vscode-zipfs",
+    "dbaeumer.vscode-eslint"
+  ]
+}

frontend/.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+  "search.exclude": {
+    "**/.yarn": true,
+    "**/.pnp.*": true
+  },
+  "eslint.nodePath": ".yarn/sdks",
+  "typescript.tsdk": ".yarn/sdks/typescript/lib",
+  "typescript.enablePromptUseWorkspaceTsdk": true
+}

frontend/.yarnrc.yml

@@ -0,0 +1,2 @@
+yarnPath: .yarn/releases/yarn-4.5.3.cjs
+nodeLinker: node-modules

frontend/package.json

@@ -1,27 +1,26 @@
 {
-	"name": "frontend",
-	"version": "0.1.0",
-	"private": true,
-	"scripts": {
-		"dev": "next dev --turbopack",
-		"build": "next build",
-		"start": "next start",
-		"lint": "next lint"
-	},
-	"dependencies": {
-		"react": "^19.0.0",
-		"react-dom": "^19.0.0",
-		"next": "15.0.4"
-	},
-	"devDependencies": {
-		"typescript": "^5",
-		"@types/node": "22.10.1",
-		"@types/react": "^19",
-		"@types/react-dom": "^19",
-		"postcss": "^8",
-		"tailwindcss": "^3.4.1",
-		"eslint": "9.16.0",
-		"eslint-config-next": "15.0.4"
-	}
+  "name": "frontend",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev --turbopack",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "next": "15.0.4",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "22.10.1",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "eslint": "9.16.0",
+    "eslint-config-next": "15.0.4",
+    "postcss": "^8",
+    "tailwindcss": "^3.4.1",
+    "typescript": "^5"
+  }
 }
-