add basic eslint. Still need to configure.

Author: CalPinSW

frontend/eslint.config.js

@@ -0,0 +1,18 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+import tseslint from "typescript-eslint";
+import pluginReact from "eslint-plugin-react";
+
+export default [
+
+  {
+    languageOptions: { globals: globals.browser }
+  },
+  pluginJs.configs.recommended,
+  ...tseslint.configs.recommended,
+  pluginReact.configs.flat.recommended,
+  {
+    files: ["src/**/*.js"],
+    ignores: ["**/*.tsx"],
+  },
+];