* Added "Shadow" set (Red, Green, Blue, transparent BG)
3 additional themes sticking primarily to flat colors, which the exception of icons and border being slightly darker. All 3 themes also have transparent backgrounds that will show differently per-user via GiHub's own light and dark themes. Transparency should also still provide easy readability for both.
* Test
Just want to see if we can make the themes have a transparent background.
* Shadows moved under Transparent
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Co-authored-by: Zohan Subhash <zohan.subhash@gmail.com>
