feat: adding initial source code

stylesheet.css

@@ -0,0 +1,37 @@
+/* Add your custom extension styling here */
+.active-window-border {
+    /*border: 2px solid rgba(191, 0, 255, 0.8);*/
+    /*border-radius: 3px;*/
+
+/*    border-image-source: linear-gradient(to left, #743ad5, #d53a9d);*/
+/*    !*border: 4px solid transparent;*!*/
+/*    !*border-radius: 5px;*!*/
+
+/*    !*!* Gradient border using border-image *!*/
+/*    border-image: linear-gradient(45deg, red, orange, yellow, green, blue, indigo, violet) 1;*/
+
+}
+
+/*.border-gradient-purple {*/
+/*    border-image-source: linear-gradient(to left, #743ad5, #d53a9d);*/
+/*}*/
+
+/*@keyframes rainbow-border {*/
+/*    0% {*/
+/*        border-image: linear-gradient(0deg, red, orange, yellow, green, blue, indigo, violet, red) 1;*/
+/*    }*/
+/*    100% {*/
+/*        border-image: linear-gradient(360deg, red, orange, yellow, green, blue, indigo, violet, red) 1;*/
+/*    }*/
+/*}*/
+
+/*.active-window-border {*/
+/*    border: 4px solid transparent;*/
+/*    border-radius: 5px;*/
+
+/*    !* Initial gradient border *!*/
+/*    border-image: linear-gradient(0deg, red, orange, yellow, green, blue, indigo, violet, red) 1;*/
+
+/*    !* Apply animation *!*/
+/*    animation: rainbow-border 5s linear infinite;*/
+/*}*/