chore(less): move lookups to catppuccin.less

Rename catppuccin-lookups to just catppuccin as it is the main file for colours definitions.

less/catppuccin-accents.less

@@ -1,45 +0,0 @@
-#accent(@accent) when (@accent = rosewater) {
-  @accent-colour: @rosewater;
-}
-#accent(@accent) when (@accent = flamingo) {
-  @accent-colour: @flamingo;
-}
-#accent(@accent) when (@accent = pink) {
-  @accent-colour: @pink;
-}
-#accent(@accent) when (@accent = mauve) {
-  @accent-colour: @mauve;
-}
-#accent(@accent) when (@accent = red) {
-  @accent-colour: @red;
-}
-#accent(@accent) when (@accent = maroon) {
-  @accent-colour: @maroon;
-}
-#accent(@accent) when (@accent = peach) {
-  @accent-colour: @peach;
-}
-#accent(@accent) when (@accent = yellow) {
-  @accent-colour: @yellow;
-}
-#accent(@accent) when (@accent = green) {
-  @accent-colour: @green;
-}
-#accent(@accent) when (@accent = teal) {
-  @accent-colour: @teal;
-}
-#accent(@accent) when (@accent = blue) {
-  @accent-colour: @blue;
-}
-#accent(@accent) when (@accent = sapphire) {
-  @accent-colour: @sapphire;
-}
-#accent(@accent) when (@accent = sky) {
-  @accent-colour: @sky;
-}
-#accent(@accent) when (@accent = lavender) {
-  @accent-colour: @lavender;
-}
-#accent(@accent) when (@accent = subtext0) {
-  @accent-colour: @subtext0;
-}