Describe the bug
ecal_mon_gui can't display the message contents of rustecal protobuf publishers.

Edit - I see its not implemented yet
https://github.com/eclipse-ecal/rustecal/blob/main/rustecal-types-protobuf/src/lib.rs#L41

To Reproduce
Steps to reproduce the behavior:

1. If [Bug] ecal_mon_gui does not display rustecal publishers and subscribers #78 has not be resolved. Change person_send Ecal::Initialize from Some("person send rust") to None so it will be visible in ecal_mon_gui
2. Start ecal_mon_gui
3. cargo run --bin person_send
4. Try to view the person topic
5. Observe it can't be displayed

Expected behavior
Parse the protobuf and display in ecal_mon_gui

System information

• OS:Ubuntu 24.04
• Rust version: rustc 1.89.0 (29483883e 2025-08-04)
• eCAL version: 6.0.0 ppa
• rustecal version: main

Additional context