How to: Network Speed
```bash
set -g @powerkit_plugin_network_interface "auto"  # or eth0, wlan0, etc.
set -g @powerkit_plugin_network_icon_up "󰕒"
set -g @powerkit_plugin_network_icon_down "󰇚"
set -g @powerkit_plugin_network_format "both"  # up, down, both
```