Update About Section in Header Menu

[Mephistic]

Goal

We want to streamline the About section in our header menu to make it easier for users to educate themselves about MAPLE.

Success Criteria

• Condense the 3 separate “Why Use MAPLE” pages into tabs on a single page (like the tabs in the current Learn page - https://www.mapletestimony.org/learn/basics-of-testimony)
• Remove “Privacy Policy & Code of Conduct” from the About section of the menu
• Re-order the subpages under About to reflect the names below
  • Our Mission & Goals
  • Our Team
  • How to Support MAPLE
  • FAQ

Additional Links
Figma: https://www.figma.com/file/xgEgPpUqzJP4fPk4uRbulq/MAPLE-Design-Library?type=design&node-id=0-1&mode=design&t=cQTooxCIoqRwG6Yq-11
Parent Issue for the header re-organization: #1489

[Lulu Case]

Working on

[Lulu Case]

Ok, now I have truly set up the environment (front-end)

[Mephistic]

@JabaDUDE