feat: add ash light/dark omarchy themes derived from harbor

tools/reference/dark/cava_theme

@@ -0,0 +1,11 @@
+[color]
+gradient = 1
+gradient_count = 8
+gradient_color_1 = '#e75a50'
+gradient_color_2 = '#77838a'
+gradient_color_3 = '#a99b7a'
+gradient_color_4 = '#a99b7a'
+gradient_color_5 = '#e75a50'
+gradient_color_6 = '#f44336'
+gradient_color_7 = '#a99b7a'
+gradient_color_8 = '#a99b7a'