* Set `scroll-step` to 2 and remove `on-scroll-up`/`on-scroll-down` action (which is doing the same thing)
* Format as icon|volume instead of volume|icon for consistency with other modules
* Remove `format-source` settings since it seems to be set up inconsistently. This feature also behaves oddly by default (for example, it cannot have an on-click or scroll behavior independent from volume--kind of unintuitive). If a user wants to use this feature it will likely work better to break out source into a separate module like this: https://github.com/Alexays/Waybar/issues/925#issuecomment-1377761376
* Remove `format-bluetooth` settings since it is not defining a different behavior after removing `format-source`
* Replaced , 婢, , and icons since they are all depreciated/removed from Nerd Font icon set
* Added additional icons to `default` to have different icons for low, medium, and high volume settings
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