Enable a good Aspire experience for ASP.NET Framework migrations

This issue is to track what is needed to make a good Aspire experience for incremental migration.

## dotnet/systemweb-adapters

Anything required here:

- https://github.com/dotnet/systemweb-adapters/pull/596
- https://github.com/dotnet/systemweb-adapters/pull/597
- https://github.com/dotnet/systemweb-adapters/pull/603

## dotnet/aspire:

There are some feature gaps with Aspire that make some of this a bit more difficult. This tracks the issues/prs:

- https://github.com/microsoft/aspire/pull/10470
- https://github.com/microsoft/aspire/issues/6789
- https://github.com/microsoft/aspire/pull/10507
- https://github.com/microsoft/aspire/issues/4984

## CommunityToolkit/Aspire

- https://github.com/CommunityToolkit/Aspire/issues/250

## dotnet/aspnetcore.docs

These items are track necessary changes to ensure the documentation is up-to-date and can be used to migrate an application

- https://github.com/dotnet/AspNetCore.Docs/pull/35755