Added the header for the missing files

[emregokrem]

💡 What is the current behavior?

Some of files don't have header.

GitHub Issue Number: #46

🆕 What is the new behavior?

The header was added for the missing files

🏁 Checklist

A pull request can only be merged if all of these conditions are met (where applicable):

• [x] 🦮 Accessibility (a11y) features were implemented
• [x] 🗺️ Internationalization (i18n) - no hard coded strings
• [x] 📲 Responsiveness - components handle viewport changes and content overflow gracefully
• [x] 📄 Documentation was reviewed/updated
• [x] 🧪 Unit tests were added/updated and pass (dotnet test)
• [x] 🏗️ Successful compilation (dotnet build, changes pushed)

👨‍💻 Help & support