Refactor Container Copy Permissions Screen: Group-based Validation and Improved Loading UX (#2269)

* grouped permissions and added styles

* Adding loading overlay for the permission sections

src/Common/LoadingOverlay.tsx

@@ -0,0 +1,31 @@
+import { Overlay, Spinner, SpinnerSize } from "@fluentui/react";
+import React from "react";
+
+interface LoadingOverlayProps {
+  isLoading: boolean;
+  label: string;
+}
+
+const LoadingOverlay: React.FC<LoadingOverlayProps> = ({ isLoading, label }) => {
+  if (!isLoading) {
+    return null;
+  }
+
+  return (
+    <Overlay
+      styles={{
+        root: {
+          backgroundColor: "rgba(255,255,255,0.9)",
+          zIndex: 9999,
+          display: "flex",
+          alignItems: "center",
+          justifyContent: "center",
+        },
+      }}
+    >
+      <Spinner size={SpinnerSize.large} label={label} styles={{ label: { fontWeight: 600 } }} />
+    </Overlay>
+  );
+};
+
+export default LoadingOverlay;