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

server/env.ts

@@ -0,0 +1,6 @@
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+require("dotenv").config({
+  silent: true,
+});
+
+export default process.env;