refactor: remove unused imports across cloud page components

- Cleaned up unused component imports (CircleBackground, Button, Texts components)
- Removed unused utility function classNames
- Changed button color prop from "dark" to "white" in CallToAction component

src/pages/cloud/CloudPage.tsx

@@ -1,6 +1,5 @@
 import { AnimatedSection } from '../../components/AnimatedSection'
 import { CloudArchitecture } from './CloudArchitecture'
-import { CloudFeatures } from './CloudFeatures'
 import { CloudUseCases } from './CloudUseCases'
 import { CloudHeroNew } from './CloudHeroNew'
 import { CloudBluePrint } from './CloudBluePrint'