Please add setting for the display brightness

[yarda]

Describe the feature you'd like
The python application has the -B switch to set the display brightness. It mostly works. Please add this setting to the application.

Screenshots

Additional context
Lower brightness saves battery power thus the badge can operate longer. This is useful especially at night when the 100% brightness can be too much.

Would you like to work on the issue?
I could work on the issue if nobody is interested.

[erAck]

Brightness can be adjusted on the badge by pressing the lower button for 1s, there are 4 levels to cycle through.