Build the blank state Home page

[zdeveloper]

In this story, please build the skeleton for the landing/home page

Acceptance Criteria

• The landing page should be hosted in the / route
• The page should show the empty state design
• clicking on + New Template button should route to /new-template/upload
• the left side nav bar links will not be functional for this story
• follow the attached design, use uswds components without customization as much as possible

Additional context Figma https://www.figma.com/design/1FW8ZSDV90q2wpRPOADE9r/MDE?node-id=278-4808&t=gtngmUf4T6SXlXBu-4