fix: add RTL color utilities for borders

Author: mrholek

scss/mixins/_utilities.scss

@@ -62,10 +62,20 @@
         @each $property in $properties {
           @if $generate-vars == true or $generate-only-vars == true {
             @if $generate-only-vars {
-              #{$property}: var(--#{$variable-prefix}#{$key}) if($enable-important-utilities, !important, null);
+              @if $generate-rtl == true {
+                @include ltr-rtl($property, var(--#{$variable-prefix}#{$key}), null, null, if($enable-important-utilities, !important, null));
+              }
+              @else {
+                #{$property}: var(--#{$variable-prefix}#{$key}) if($enable-important-utilities, !important, null);
+              }
             }
             @else {
-              #{$property}: var(--#{$variable-prefix}#{$key}, $value) if($enable-important-utilities, !important, null);
+              @if $generate-rtl == true {
+                @include ltr-rtl($property, var(--#{$variable-prefix}#{$key}, $value), null, null, if($enable-important-utilities, !important, null));
+              }
+              @else {
+                #{$property}: var(--#{$variable-prefix}#{$key}, $value) if($enable-important-utilities, !important, null);
+              }
             }
           }
           @else {