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/services/collaboration.ts

@@ -0,0 +1,41 @@
+import http from "http";
+import url from "url";
+import { Server } from "@hocuspocus/server";
+import invariant from "invariant";
+import Koa from "koa";
+import WebSocket from "ws";
+import AuthenticationExtension from "../collaboration/authentication";
+import LoggerExtension from "../collaboration/logger";
+import PersistenceExtension from "../collaboration/persistence";
+import TracingExtension from "../collaboration/tracing";
+
+export default function init(app: Koa, server: http.Server) {
+  const path = "/collaboration";
+  const wss = new WebSocket.Server({
+    noServer: true,
+  });
+  const hocuspocus = Server.configure({
+    extensions: [
+      new AuthenticationExtension(),
+      // @ts-expect-error ts-migrate(2322) FIXME: Type 'Persistence' is not assignable to type 'Exte... Remove this comment to see the full error message
+      new PersistenceExtension(),
+      new LoggerExtension(),
+      // @ts-expect-error ts-migrate(2322) FIXME: Type 'Persistence' is not assignable to type 'Exte... Remove this comment to see the full error message
+      new TracingExtension(),
+    ],
+  });
+  server.on("upgrade", function (req, socket, head) {
+    if (req.url && req.url.indexOf(path) > -1) {
+      const documentName = url.parse(req.url).pathname?.split("/").pop();
+      invariant(documentName, "Document name must be provided");
+
+      // @ts-expect-error ts-migrate(2345) FIXME: Argument of type 'Duplex' is not assignable to par... Remove this comment to see the full error message
+      wss.handleUpgrade(req, socket, head, (client) => {
+        hocuspocus.handleConnection(client, req, documentName);
+      });
+    }
+  });
+  server.on("shutdown", () => {
+    hocuspocus.destroy();
+  });
+}