feat: eslint configuration

eslint.config.mjs

@@ -0,0 +1,20 @@
+// @ts-check
+
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config({
+  extends: [eslint.configs.recommended, tseslint.configs.recommended],
+  ignores: ["*.d.ts"],
+  languageOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+    parserOptions: { ecmaFeatures: { jsx: true } },
+  },
+  settings: {
+    env: {
+      browser: true,
+      es6: true,
+    },
+  },
+});