chore: Move to Typescript (#2783)

This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.

closes #1282

app/scenes/Document/components/Loading.tsx

@@ -0,0 +1,25 @@
+import { Location } from "history";
+import * as React from "react";
+import { useTranslation } from "react-i18next";
+import CenteredContent from "~/components/CenteredContent";
+import PageTitle from "~/components/PageTitle";
+import PlaceholderDocument from "~/components/PlaceholderDocument";
+import Container from "./Container";
+
+type Props = {
+  location: Location<{ title?: string }>;
+};
+
+export default function Loading({ location }: Props) {
+  const { t } = useTranslation();
+  return (
+    <Container column auto>
+      <PageTitle
+        title={location.state ? location.state.title : t("Untitled")}
+      />
+      <CenteredContent>
+        <PlaceholderDocument />
+      </CenteredContent>
+    </Container>
+  );
+}