Add weapon icons & Custom icon image in Channel groups

[TruongTanLuc201270]

Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Weapon icon, custom icon channel groups

Why do you want this feature?

As above

Additional information

• Weapon icon: Pistol, Shotgun, SMG, Rife, Launcher, Knife, etc.
• Custom icon png file

[ShareASmile]

Closing in favor of #12139