add a contact form and finish the mobile version

[selma-belhadj]

in this part of the project, I have done the following tasks:

• Build the contact form in my portfolio with HTML5 validations.
• Implement the button interactions (enable, hover, etc.).
• Follow all the project requirements by making sure that:
  • Name field accepts up to 30 chars.
  • Email field accepts only emails.
  • Message field accepts up to 500 chars.
  • All fields have placeholder text.
  • All fields have the correct type.
  • A user cannot submit the form if one or more of the fields is empty.
  • And stick to the design of the Figma template as much as possible.