refactor: Setup eslint and fix issues (WIP)

eslint.config.mjs

@@ -0,0 +1,20 @@
+import globals from 'globals'
+
+import path from 'path'
+import {fileURLToPath} from 'url'
+import {FlatCompat} from '@eslint/eslintrc'
+import pluginJs from '@eslint/js'
+
+// mimic CommonJS variables -- not needed if using CommonJS
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+const compat = new FlatCompat({baseDirectory: __dirname, recommendedConfig: pluginJs.configs.recommended})
+
+export default [
+    {
+        languageOptions: {
+            globals: globals.node
+        }
+    },
+    ...compat.extends('standard-with-typescript')
+]