feat: add RTL support

Author: mrholek

src/scss/_layout.scss

@@ -1,6 +1,6 @@
 .wrapper {
   width: 100%;
-  padding-left: var(--cui-sidebar-occupy, 0);
+  @include ltr-rtl("padding-left", var(--cui-sidebar-occupy, 0));
   transform: translateZ(0);
   will-change: auto;
   @include transition(padding .15s);

src/scss/style.scss

@@ -1,6 +1,9 @@
 // If you want to override variables do it here
 @import "variables";
 
+$enable-ltr: true;
+$enable-rtl: true;
+
 // Import styles
 @import "@coreui/coreui/scss/coreui";