dotnet-scaffold-aspire with some commands to add packages.

dotnet-scaffold-aspire now has 3 commands : caching, database, and storage. Some info about these below:

currently the commands install the appropriate packages using DotnetCommands.AddPackage
all have --type and --host-project options. Help with which packages to install
have an --web-project or --api-project for the other associated package to install packages to.
later will have Program.cs changes and additional files being added.
Microsoft.DotNet.Tools.Scaffold.Aspire.Helpers.PackageConstants contains all needed package names and dictionaries to help with scenarios.

Other changes:

added InteractivePickerType.CustomPicker to allow Parameter to force the user to pick from a set of custom values.
removed any IEnvironmentVariableProvider, not needed currently and was throwing commandline execution off.

dotnet / Scaffolding