Update the navigation header

[kevinherdez]

Update the navigation header to match the designs

https://www.figma.com/design/Bai2w7x0vUakL5WRjPGRg7/AVY-Native-App?node-id=3150-5579&p=f&t=qJXxchehJMUHrDPB-0

[kevinherdez]

For right now we're not going to do the branding color