feat: Add networking commands for z3ed CLI

- Implemented new CLI commands for network operations, including `net connect`, `net join`, `net leave`, and `net proposal` for real-time collaboration.
- Enhanced the `CollaborationService` and `WebSocketClient` to support session management and proposal submissions.
- Updated `README.md` to include usage instructions for the new networking commands and features.
- Improved CMake configuration to include new source files for networking functionalities.

src/app/net/net_library.cmake

@@ -13,6 +13,7 @@ set(
   YAZE_NET_SRC
   app/net/rom_version_manager.cc
   app/net/websocket_client.cc
+  app/net/collaboration_service.cc
 )
 
 add_library(yaze_net STATIC ${YAZE_NET_SRC})