chore: add ESLint and update deps

eslint.config.js

@@ -0,0 +1,12 @@
+import { defineConfig } from "eslint/config";
+import globals from "globals";
+import js from "@eslint/js";
+import tseslint from "typescript-eslint";
+
+
+export default defineConfig([
+  { files: ["**/*.{js,mjs,cjs,ts}"] },
+  { files: ["**/*.{js,mjs,cjs,ts}"], languageOptions: { globals: globals.browser } },
+  { files: ["**/*.{js,mjs,cjs,ts}"], plugins: { js }, extends: ["js/recommended"] },
+  tseslint.configs.recommended,
+]);

package.json

@@ -9,7 +9,11 @@
     "preview": "vite preview"
   },
   "devDependencies": {
+    "@eslint/js": "^9.24.0",
+    "eslint": "^9.24.0",
+    "globals": "^16.0.0",
     "typescript": "~5.7.2",
+    "typescript-eslint": "^8.29.0",
     "vite": "^6.2.0"
   }
 }