Make getting started more obvious when reading docs

We have had lots of great conversations over the last couple of years on improving doc layout. I don't want to forget all that, but this is something we could potentially do that is low cost and will help people getting started.

I have been reading [Cosmos docs](https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/), and I noticed this structure:

That is, at the top level there are "Quickstarts" "Tutorials". These break out for the potential dimensions--in Cosmos case, the platforms/languages. The tutorials are then about building different kinds of applications.

For us, I think it would be:

- Quickstarts
- Use EF Core with Azure Cosmos DB
- Use EF Core with Azure SQL
- Use EF Core with SQL Server on-premise
- Use EF Core with PostgreSQL
- Use EF Core with SQLite
- Use EF Core with MongoDB
- Use EF Core with MySql
- Use EF Core with Oracle
- Tutorials
- Build a console application with EF Core
- Build an ASP.NET Core minimal API with EF Core
- Build an ASP.NET Core Blazor application with EF Core
- Build a Windows Forms application with EF Core
- Build a MAUI application for EF Core
- Build a WPF application with EF Core
- Use EF Core in Jupyter Notebooks