dotnet run should facilitate acquisition of the Core Tools

[mattchenderson]

Description

If the Core Tools is not installed, dotnet run will fail with an exception similar to the following:

Unhandled exception: System.ComponentModel.Win32Exception (2): An error occurred trying to start process 'func' with working directory 'bin\Debug\net9.0'. The system cannot find the file specified.
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
at Microsoft.DotNet.Cli.Utils.Command.Execute(Action`1 processStarted)
at Microsoft.DotNet.Tools.Run.RunCommand.Execute()
at System.CommandLine.Invocation.InvocationPipeline.Invoke(ParseResult parseResult)
at System.CommandLine.ParseResult.Invoke()
at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, TimeSpan startupTime, ITelemetry telemetryClient)

This is not clearly actionable for the user. When we are in this situation, we should provide clear instructions on how to acquire the Core Tools.