feat: implement debounced live search with clear button, refactor UI components, and adjust layout spacing and image cropping across screens.

lib/features/onboarding/presentation/screens/onboarding_screen.dart

@@ -23,7 +23,7 @@ class _OnboardingScreenState extends State<OnboardingScreen> {
       iconHeight: 100,
       title: 'Connect with Top Professionals',
       subtitle:
-          'Professionals can list properties and find qualified buyers faster than ever.',
+          'Agents can highlight their specializations for buyers to find faster than ever',
     ),
     _OnboardingData(
       bgAsset: 'assets/images/onboarding_2_bg.svg',
@@ -32,7 +32,7 @@ class _OnboardingScreenState extends State<OnboardingScreen> {
       iconHeight: 75,
       title: 'Real help. Real professionals. Instantly.',
       subtitle:
-          'Chat with professionals and get answers about properties instantly.',
+          'Chat with agents instantly and find your service provider with ease',
     ),
   ];