feat(directory): added a custom scrollbar

directory/src/App.scss

@@ -33,6 +33,27 @@
   min-height: 100vh;
 }
 
+*::-webkit-scrollbar {
+  width: 12px;
+}
+
+*::-webkit-scrollbar-track {
+  background-color: transparent;
+}
+
+*::-webkit-scrollbar-thumb {
+  background-color: var(--border-color);
+  border-radius: 100px;
+  border: 5px solid transparent;
+  background-clip: padding-box;
+  transition: all 0.3s ease-in-out;
+}
+
+*::-webkit-scrollbar-thumb:hover {
+  border: 4px solid transparent;
+  background-color: var(--text-color);
+}
+
 a {
   color: var(--text-color);
   text-decoration: none;