feat: init collaboration backend & adapt editor

apps/collaboration/app.ts

@@ -0,0 +1,9 @@
+import { Hocuspocus } from "@hocuspocus/server";
+
+// Configure the server …
+const server = new Hocuspocus({
+  port: 1998,
+});
+
+// … and run it!
+server.listen();

apps/collaboration/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "collaboration",
+  "version": "1.0.0",
+  "description": "",
+  "main": "app.ts",
+  "scripts": {
+    "start": "bun app.ts"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@hocuspocus/server": "^2.11.3",
+    "bun": "^1.0.36",
+    "typescript": "5.4.3",
+    "y-protocols": "^1.0.6",
+    "yjs": "^13.6.14"
+  }
+}