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/components/account/showReverseShareLinkModal.tsx

@@ -1,14 +1,16 @@
 import { Stack, TextInput } from "@mantine/core";
 import { ModalsContextProps } from "@mantine/modals/lib/context";
+import { translateOutsideContext } from "../../hooks/useTranslate.hook";
 
 const showReverseShareLinkModal = (
   modals: ModalsContextProps,
   reverseShareToken: string,
   appUrl: string
 ) => {
+  const t = translateOutsideContext();
   const link = `${appUrl}/upload/${reverseShareToken}`;
   return modals.openModal({
-    title: "Reverse share link",
+    title: t("account.reverseShares.modal.reverse-share-link"),
     children: (
       <Stack align="stretch">
         <TextInput variant="filled" value={link} />