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/components/Sidebar/components/PlaceholderCollections.tsx

@@ -0,0 +1,21 @@
+import * as React from "react";
+import styled from "styled-components";
+import PlaceholderText from "~/components/PlaceholderText";
+
+function PlaceholderCollections() {
+  return (
+    <Wrapper>
+      <PlaceholderText />
+      <PlaceholderText delay={0.2} />
+      <PlaceholderText delay={0.4} />
+    </Wrapper>
+  );
+}
+
+const Wrapper = styled.div`
+  margin: 4px 16px;
+  margin-left: 40px;
+  width: 75%;
+`;
+
+export default PlaceholderCollections;