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/routes/api/middlewares/apiWrapper.ts

@@ -0,0 +1,24 @@
+import stream from "stream";
+import { Context } from "koa";
+
+export default function apiWrapper() {
+  return async function apiWrapperMiddleware(
+    ctx: Context,
+    next: () => Promise<any>
+  ) {
+    await next();
+    const ok = ctx.status < 400;
+
+    if (
+      typeof ctx.body !== "string" &&
+      !(ctx.body instanceof stream.Readable)
+    ) {
+      ctx.body = {
+        // @ts-expect-error ts-migrate(2698) FIXME: Spread types may only be created from object types... Remove this comment to see the full error message
+        ...ctx.body,
+        status: ctx.status,
+        ok,
+      };
+    }
+  };
+}