Copy _app.tsx and _document.tsx within the Root Layout

[boodland]

Sub issue of #702

App router uses a Root layout which is defined at the top of the app directory and applies to all routes. We need to copy/migrate the contents of _app.tsx and _document.tsx to the root layout so they are applied for the app route.

This issue also migrate meet-the-team page in order to check that the new app route logic works as expected

[boodland]

@kyleecodes, @eleanorreem assign it to me please

[github-actions]

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[boodland]

@eleanorreem created pull request of the issue, it has been much more challenged that I expected due to all the moving pieces involved, lets start a discussion either in the pull request or slack to clarify you the issues that have motivated the implementation and tell me better ways to solve it

I won't be available next week as I will be off

[github-actions]

As per Chayn policy, after 30 days of inactivity, we will be unassigning this issue. Please comment to stay assigned.