Add Arctis Nova 3 support

[AnErrupTion]

Hello! This PR adds support for the Arctis Nova 3 headset. Alongside this, it adds 2 new capabilities that this headset implements, those being the following:

• CAP_MICROPHONE_MUTE_LED_BRIGHTNESS
• CAP_MICROPHONE_VOLUME

The headset also implements the following existing capabilities:

• CAP_SIDETONE
• CAP_EQUALIZER_PRESET
• CAP_EQUALIZER

Closes #294.

[Sapd]

Thank you!

-o probably has to be replaced with some other letter. As it will be used for output for a further release.
Also I think you forgot to map the long names like --microphone-volume into struct option opts[] = {
We could think about for the new functions, to maybe only map a long name and no short letter at all (can be done by leaving out the letter in getopt_long and implementing the function at case 0:; like done for --timeout)

[AnErrupTion]

Also I think you forgot to map the long names like --microphone-volume into struct option opts[] = {

Yup, haha! Good catch!

We could think about for the new functions, to maybe only map a long name and no short letter at all

That to me sounds like a better bet.