feat: localization (#196)

* Started adding locale translations :)

* Added some more translations

* Working on translating even more pages

* More translations

* Added test default locale retrieval

* replace `intl.formatMessage` with custom `t` hook

* add more translations

* improve title syntax

* add more translations

* translate admin config page

* translated error messages

* add language selecter

* minor fixes

* improve language handling

* add upcoming languages

* add `crowdin.yml`

* run formatter

---------

Co-authored-by: Steve Tautonico <stautonico@gmail.com>

frontend/src/pages/auth/signUp.tsx

@@ -1,10 +1,12 @@
 import SignUpForm from "../../components/auth/SignUpForm";
 import Meta from "../../components/Meta";
+import useTranslate from "../../hooks/useTranslate.hook";
 
 const SignUp = () => {
+  const t = useTranslate();
   return (
     <>
-      <Meta title="Sign Up" />
+      <Meta title={t("signup.title")} />
       <SignUpForm />
     </>
   );