feat(lint): add eslint

.gitignore

@@ -1,4 +1,5 @@
 node_modules
 ui/build
 .idea
-.DS_Store
+.DS_Store
+.vscode

ui/.eslintrc.js

@@ -0,0 +1,49 @@
+/* eslint-disable */
+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:react/recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:react-hooks/recommended",
+    "plugin:react/jsx-runtime",
+    "plugin:prettier/recommended",
+  ],
+  overrides: [],
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+  },
+  plugins: ["react", "@typescript-eslint"],
+  rules: {
+    indent: ["error", 2],
+    "linebreak-style": ["error", "unix"],
+    "@typescript-eslint/quotes": [
+      "error",
+      "double",
+      {
+        avoidEscape: true,
+        allowTemplateLiterals: true,
+      },
+    ],
+    semi: ["error", "always"],
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": [
+      "error",
+      {
+        argsIgnorePattern: "^_",
+        varsIgnorePattern: "^_",
+        caughtErrorsIgnorePattern: "^_",
+      },
+    ],
+  },
+  settings: {
+    react: {
+      version: "17.0.2",
+    },
+  },
+};