Added sample WhatToEat App

[jsuarezruiz]

This PR includes a new sample App, WhatToEat for .NET 9 and 10, highlighting efficient the usage of shell and navigation patterns.

This App comes from rachelkang/recipeSearch#37 just replacing the current API with a mock service.

The sample includes:

• src
• a README file
• images

Fixes #609

[AhmedAbuMusa]

Thanks @jsuarezruiz
I used your solution as an example of adhering to naming conventions and code structure best practices. I see that most of the project focuses on UI and navigation, but I believe it would be beneficial to add unit tests for functions in the Model and service layers to demonstrate that the solution aligns with coding best practices.