Add steps light colors (#2230)

Co-authored-by: Paweł Kuna <[email protected]>

.changeset/slimy-tigers-exercise.md

@@ -0,0 +1,5 @@
+---
+"@tabler/core": patch
+---
+
+Add steps light colors

core/scss/ui/_steps.scss

@@ -17,6 +17,10 @@
 @each $name, $color in $extra-colors {
   .steps-#{$name} {
     --#{$prefix}steps-color: var(--#{$prefix}#{$name});
+
+    &-lt {
+      --#{$prefix}steps-color: var(--#{$prefix}#{$name}-lt);
+    }
   }
 }