Apply and Upgrade Eslint (#288)

* Upgrade ESLINT and fix issues

* feat: add frontend linting job to GitHub Actions workflow

* Move UI linting to separate file

* More linting fixes

* Remove pull_request trigger from UI linting workflow

* Update UI linting workflow

* Rename frontend-lint workflow to ui-lint for clarity

ui/src/components/ExtLink.tsx

@@ -1,4 +1,5 @@
 import React from "react";
+
 import { cx } from "@/cva.config";
 
 export default function ExtLink({