[Blazor] Docs on best practices for maui and razor class libraries.

[javiercn]

@guardrex can you cover https://gist.github.com/javiercn/6fba9a9cb3fc3e1d69b6af0159c22293 in a doc article for maui and razor class libraries.

We have a significant number of people that try to combine Maui and razor class libraries on the same project (which is not something we support) and I want to make sure we have a doc covering the recommended approach we can point people to in more detail.

/cc: @danroth27 @BethMassi

[BethMassi]

@guardrex we should probably update or at least link to the existing guidance on designing reusable razor components: https://learn.microsoft.com/en-us/aspnet/core/blazor/hybrid/reuse-razor-components?view=aspnetcore-10.0

Also should mention that the .NET MAUI Blazor Hybrid and Web solution template sets up this recommended architecture for you.