Document how to use ASP.NET Core with trimming

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

There are instructions to enable trimming in an app, but there are challenges specific to ASP.NET Core.

For example:
* Certain frameworks might not support trimming at all, e.g. MVC (just speculation at the moment)
* Features may only be supported with trimming if they're excluded, e.g. controllers and DTOs must be in a non-trimmed assembly.
* Features may not be compatible with trimming, e.g. DataProtection providers can be configured based on type names located in the registry.

### Describe the solution you'd like

We should have:
- [ ] Overall documentation page for trimming with ASP.NET Core
- [ ] Content added to various frameworks and features that discuss how to use them with trimming
- [ ] aka.ms links added to trim warnings that link to trimming docs. The docs provide enough information for developers to know how to deal with trim warnings.

### Additional context

_No response_