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/presenters/notificationSetting.ts

@@ -0,0 +1,9 @@
+import { NotificationSetting } from "@server/models";
+
+// @ts-expect-error ts-migrate(2749) FIXME: 'NotificationSetting' refers to a value, but is be... Remove this comment to see the full error message
+export default function present(setting: NotificationSetting) {
+  return {
+    id: setting.id,
+    event: setting.event,
+  };
+}