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/ContextMenu/Header.ts

@@ -0,0 +1,12 @@
+import styled from "styled-components";
+
+const Header = styled.h3`
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
+  color: ${(props) => props.theme.sidebarText};
+  letter-spacing: 0.04em;
+  margin: 1em 12px 0.5em;
+`;
+
+export default Header;