Update ProfileData model to include companies and enhance profile UI

- Added a new field for companies in the ProfileData model to store associated company information.
- Updated JSON serialization methods to handle the new companies field.
- Modified profile page views to display the user's full name and company name, replacing previous role and department fields for improved clarity.
- Introduced new string constants for full name and phone in ProfileStrings.

lib/views/profile/strings/profile_strings.dart

@@ -18,4 +18,6 @@ class ProfileStrings {
   static const String role = 'role';
   static const String department = 'department';
   static const String position = 'position';
+  static const String phone = 'phone';
+  static const String fullname = 'full name';
 }