Enable eslint:recommended ruleset (#22433)

* Enable ESLint recommended ruleset

* Disable failing ESLint recommended rules

* Remove rules shadowed by eslint:recommended

app/javascript/mastodon/features/compose/util/counter.js

@@ -6,4 +6,4 @@ export function countableText(inputText) {
   return inputText
     .replace(urlRegex, urlPlaceholder)
     .replace(/(^|[^\/\w])@(([a-z0-9_]+)@[a-z0-9\.\-]+[a-z0-9]+)/ig, '$1@$3');
-};
+}