Add the Material component page in the About

[B3nz01d]

As a User of the Demo App
I want to be able to access the material components and the ouds components
So that I can review to entire list of components and compare the updates

Context

• Add a "Material 3 components" item within the About page
  • This item opens a new page
  • This page proposes 2 tabs that stick on top of the screen and where the content is only scrollable under these tabs.
    • Tab 1: OUDS
      • with all the components plugged on the OUDS Flutter Library (with Material 3 design atthe begining) that are listed one after the other in the same page
    • Tab 2: Material 3
      • with all the components plugged on the standard Flutter material 3 component library that are listed one after the other in the same page

Other context elements:

• the user in the initial version of this implementation will see the same visual element in both tabs at the begining.
• if possible, the scroll of the 2 pages should be always positioned to the same items in the page so that the user can compare both items in the 2 design systems

[B3nz01d]

@paulinea and @Tayebsed93 this new issue was created based on our discussion, let me know if it needs to be updated