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/Notice.ts

@@ -0,0 +1,11 @@
+import styled from "styled-components";
+
+const Notice = styled.p`
+  background: ${(props) => props.theme.sidebarBackground};
+  color: ${(props) => props.theme.sidebarText};
+  padding: 10px 12px;
+  border-radius: 4px;
+  position: relative;
+`;
+
+export default Notice;