Run Sniffnet on startup

Is there an existing issue for this?

• I have searched the existing issues.

Describe the solution you'd like

• Run Sniffnet on startup and keep it minimized to the system tray. (Related to https://github.com/GyulyVGC/sniffnet/issues/217) Currently, Sniffnet does not start automatically on Ubuntu 24.04.1 LTS for non-root users. I have to launch the application manually and select the traffic source each time. Please add a toggle for this option under General → Settings so users can easily enable or disable it.
• Use previous analysis configuration on startup. Sniffnet should remember the user’s last configuration and automatically resume analysis on startup by default. If needed, users can stop the analysis, change the traffic source.