Add ASP.NET Core release notes for .NET 10 Preview 7 #10022
Description
Add ASP.NET Core release notes for .NET 10 Preview 7 based on the content provided in the issue comments in dotnet/AspNetCore.Docs#35824. Edit the included content for clarity and simplicity. Include the list of contributors with links to their merged PRs for the 10.0-preview7 milestone.