feat: up to 3 options for dynamic scheme

Have up to 3 options for base colour for dynamic scheme
Variants moved to new command
Also remove parallel dependency

completions/caelestia.fish

@@ -1,6 +1,6 @@
 set -l seen '__fish_seen_subcommand_from'
 set -l has_opt '__fish_contains_opt'
-set -l commands help install shell toggle workspace-action scheme screenshot record clipboard clipboard-delete emoji-picker wallpaper pip
+set -l commands help install shell toggle workspace-action scheme variant screenshot record clipboard clipboard-delete emoji-picker wallpaper pip
 set -l not_seen "not $seen $commands"
 
 # Disable file completions
@@ -13,6 +13,7 @@ complete -c caelestia -n $not_seen -a 'shell' -d 'Start the shell or message it'
 complete -c caelestia -n $not_seen -a 'toggle' -d 'Toggle a special workspace'
 complete -c caelestia -n $not_seen -a 'workspace-action' -d 'Exec a dispatcher in the current group'
 complete -c caelestia -n $not_seen -a 'scheme' -d 'Switch the current colour scheme'
+complete -c caelestia -n $not_seen -a 'variant' -d 'Switch the current scheme variant'
 complete -c caelestia -n $not_seen -a 'screenshot' -d 'Take a screenshot'
 complete -c caelestia -n $not_seen -a 'record' -d 'Take a screen recording'
 complete -c caelestia -n $not_seen -a 'clipboard' -d 'Open clipboard history'
@@ -69,6 +70,10 @@ for scheme in $commands
     end
 end
 
+# Variant
+set -l commands vibrant tonalspot expressive fidelity fruitsalad rainbow neutral content monochrome
+complete -c caelestia -n "$seen variant && not $seen $commands" -a "$commands"
+
 # Record
 set -l not_seen "$seen record && not $has_opt -s h help"
 complete -c caelestia -n "$not_seen && not $has_opt -s s sound && not $has_opt -s r region && not $has_opt -s c compression && not $has_opt -s H hwaccel" \