Implement semantic theme color system

test/cli

@@ -222,22 +222,20 @@ foreground = "#ffffff"
 background = "#000000"
 selection_foreground = "#000000"
 selection_background = "#808080"
-color0 = "#000000"
-color1 = "#ff0000"
-color2 = "#00ff00"
-color3 = "#ffff00"
-color4 = "#0000ff"
-color5 = "#ff00ff"
-color6 = "#00ffff"
-color7 = "#ffffff"
-color8 = "#111111"
-color9 = "#ff1111"
-color10 = "#11ff11"
-color11 = "#ffff11"
-color12 = "#1111ff"
-color13 = "#ff11ff"
-color14 = "#11ffff"
-color15 = "#eeeeee"
+red = "#ff0000"
+green = "#00ff00"
+yellow = "#ffff00"
+blue = "#0000ff"
+purple = "#ff00ff"
+cyan = "#00ffff"
+muted = "#111111"
+bright_red = "#ff1111"
+bright_green = "#11ff11"
+bright_yellow = "#ffff11"
+bright_blue = "#1111ff"
+bright_purple = "#ff11ff"
+bright_cyan = "#11ffff"
+bright_fg = "#eeeeee"
 EOF
 
 cat >"$USER_THEMED/mix-test.txt.tpl" <<'EOF'