Add ASP.NET Core release notes for .NET 10 Release Candidate 1. Base the release notes content provided on the issue comments in dotnet/AspNetCore.Docs#35994. Edit the included content for clarity and simplicity. Include the list of external contributors with links to their merged PRs for the 10.0-rc1 milestone. You can identify external PRs in the dotnet/aspnetcore repo using the community-contribution label. Base the release notes PR on the dotnet10-rc1 branch in this repo.