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/policies/group.ts

@@ -0,0 +1,26 @@
+import { Group, User, Team } from "@server/models";
+import { AdminRequiredError } from "../errors";
+import policy from "./policy";
+
+const { allow } = policy;
+
+allow(User, "createGroup", Team, (actor, team) => {
+  if (!team || actor.isViewer || actor.teamId !== team.id) return false;
+  if (actor.isAdmin) return true;
+
+  throw AdminRequiredError();
+});
+
+allow(User, "read", Group, (actor, group) => {
+  // for the time being, we're going to let everyone on the team see every group
+  // we may need to make this more granular in the future
+  if (!group || actor.teamId !== group.teamId) return false;
+  return true;
+});
+
+allow(User, ["update", "delete"], Group, (actor, group) => {
+  if (!group || actor.isViewer || actor.teamId !== group.teamId) return false;
+  if (actor.isAdmin) return true;
+
+  throw AdminRequiredError();
+});