Learn training content: 2 New Modules

[wadepickett]

Write/code two new learn training modules which will be on learn-pr

Just keeping a reminder here in GitHub for reserving the time to do them: [NEW MODULE] Introduction to .NET web development with ASP.NET Core #296927 [NEW MODULE] Build your first ASP.NET Core app #296928

Just noting them here so I remember to reserve time in the sprint it is assigned.