feat: auto copy button code

assets/scss/common/_variables.scss

@@ -24,6 +24,10 @@ $pink-500: #d32e9d;
 
 $primary: $purple;
 
+$color-btn-bg: $pink-500;
+$color-btn-border: darken($pink-500, 5%);
+$color-btn-text: $white;
+
 // Options
 //
 // Quickly modify global styling by enabling or disabling optional features.