[WEB-2278] dev: scroll area enhancement (#6612)

* chore: radix-ui react-scroll-area added to plane ui package

* chore: scrollbar color token added to tailwind config

* dev: scroll area component

* chore-scroll-area-component-improvement

* fix: build error

* chore: code refactor

packages/tailwind-config/tailwind.config.js

@@ -203,6 +203,11 @@ module.exports = {
             },
           },
           backdrop: "rgba(0, 0, 0, 0.25)",
+          scrollbar: {
+            neutral: "rgba(96, 100, 108, 0.1)",
+            hover: "rgba(96, 100, 108, 0.25)",
+            active: "rgba(96, 100, 108, 0.7)",
+          },
         },
         onboarding: {
           background: {