chore: isolate frontend and backend via npm workspaces and @mmapp/contracts

Co-authored-by: Cursor <cursoragent@cursor.com>

entities/server/model/mappers.ts

@@ -1,4 +1,4 @@
-import type { ServerRead } from "@/packages/contracts/src/servers"
+import type { ServerRead } from "@mmapp/contracts/servers"
 import type { Server } from "@/lib/data"
 
 export function toFrontendServer(server: ServerRead): Server {