Feature added: Contact form with subject and message fields

This merge request migrates the contact form component of the Neologie website. The key features include:

1. Subject Field:

   • Includes a pencil icon on the left side of the input field
   • The field is required and has a placeholder of "Betreff"
   • The field spans the full width of the form

2. Message Field:

   • The message field is a textarea with a minimum height of 200px
   • The field is required and has a placeholder of "Ihre Nachricht"
   • The field also spans the full width of the form

3. Submit Button:

   • The submit button has a paper airplane icon in the middle of it.
   • The button spans the full width of the form

4. Styling:

   • The form is centered on the page with a maximum width of 2xl (1200px)
   • The form is padded on the left and right by 8 and 16 respectively
   • The form is placed inside a white (or dark mode black) card with rounded corners and a drop shadow

5. Accessibility:

   • The form and input fields have proper ARIA labels for screen readers
   • The heading for the form has an id that is referenced by the aria-labelledby attribute on the form.

6. Error Handling:

   • Form validation is yet to be implemented.

Task: #52231 - Migrate Contact form and BDNPrint