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/collectionGroupMembership.ts

@@ -0,0 +1,18 @@
+import { CollectionGroup } from "@server/models";
+
+type Membership = {
+  id: string;
+  groupId: string;
+  collectionId: string;
+  permission: string;
+};
+
+// @ts-expect-error ts-migrate(2749) FIXME: 'CollectionGroup' refers to a value, but is being ... Remove this comment to see the full error message
+export default (membership: CollectionGroup): Membership => {
+  return {
+    id: `${membership.groupId}-${membership.collectionId}`,
+    groupId: membership.groupId,
+    collectionId: membership.collectionId,
+    permission: membership.permission,
+  };
+};