Add channel and categories dividers, Color channels and categories by Distress#6856

I want to introduce the channel and categories dividers This is to have an order in the channel, have a space between the categories or channels, without having an associated channel icon (an invisible category type to be able to separate the categories or channels, without any icon) as well as implementing a new one function to add colors to voice or text channels, to have a better experience and customization in our own channels.