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/test/setup.ts

@@ -0,0 +1,11 @@
+import "../env";
+
+// test environment variables
+process.env.DATABASE_URL = process.env.DATABASE_URL_TEST;
+process.env.NODE_ENV = "test";
+process.env.GOOGLE_CLIENT_ID = "123";
+process.env.SLACK_KEY = "123";
+process.env.DEPLOYMENT = "";
+process.env.ALLOWED_DOMAINS = "allowed-domain.com";
+// This is needed for the relative manual mock to be picked up
+jest.mock("../queues");