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/Popover.tsx

@@ -0,0 +1,32 @@
+import * as React from "react";
+import { Popover as ReakitPopover } from "reakit/Popover";
+import styled from "styled-components";
+import { fadeAndScaleIn } from "~/styles/animations";
+
+type Props = {
+  children: React.ReactNode;
+  tabIndex?: number;
+  width?: number;
+};
+
+function Popover({ children, width = 380, ...rest }: Props) {
+  return (
+    <ReakitPopover {...rest}>
+      <Contents width={width}>{children}</Contents>
+    </ReakitPopover>
+  );
+}
+
+const Contents = styled.div<{ width: number }>`
+  animation: ${fadeAndScaleIn} 200ms ease;
+  transform-origin: 75% 0;
+  background: ${(props) => props.theme.menuBackground};
+  border-radius: 6px;
+  padding: 12px 24px;
+  max-height: 50vh;
+  overflow-y: scroll;
+  width: ${(props) => props.width}px;
+  box-shadow: ${(props) => props.theme.menuShadow};
+`;
+
+export default Popover;