Fix error if no matching packages found

[martincostello]

In the scenario where a project is using prerelease packages but specifies --pre-release:Never and there are no stable packages available, dotnet outdated would return an error and list blank versions to upgrade to.

Instead, if no packages are found for upgrade, report the package itself as the latest version.

For example, running dotnet-outdated against martincostello/website@99fad95 (which is currently using .NET 9 RC1 and no stable version of .NET 9 is yet available) gives the following output:

❯ dotnet outdated --pre-release:Never
» C:\Coding\martincostello\website\perf\Website.Benchmarks\Website.Benchmarks.csproj
  [net9.0]
  StyleCop.Analyzers  1.2.0-beta.556 ->

» C:\Coding\martincostello\website\src\Website\Website.csproj
  [net9.0]
  Microsoft.AspNetCore.AzureAppServices.HostingStartup  9.0.0-rc.1.24452.1 ->
  OpenTelemetry.Resources.Azure                         1.0.0-beta.8       ->
  OpenTelemetry.Resources.Container                     1.0.0-beta.9       ->
  StyleCop.Analyzers                                    1.2.0-beta.556     ->

» C:\Coding\martincostello\website\tests\Website.EndToEndTests\Website.EndToEndTests.csproj
  [net9.0]
  StyleCop.Analyzers  1.2.0-beta.556 ->

» C:\Coding\martincostello\website\tests\Website.Tests.Shared\Website.Tests.Shared.csproj
  [net9.0]
  Microsoft.Playwright  1.46.0         -> 1.47.0
  StyleCop.Analyzers    1.2.0-beta.556 ->

» C:\Coding\martincostello\website\tests\Website.Tests\Website.Tests.csproj
  [net9.0]
  Microsoft.AspNetCore.Mvc.Testing  9.0.0-rc.1.24452.1 ->
  StyleCop.Analyzers                1.2.0-beta.556     ->

Errors occurred while analyzing dependencies for some of your projects. Are you sure you can connect to all your configured NuGet servers?

Unable to find DOTNET_HOST_PATH environment variable. If you use credential providers for your NuGet sources you need to have this set to the path to the `dotnet` executable.

Version color legend:
<red>   : Major version update or pre-release version. Possible breaking changes.
<yellow>: Minor version update. Backwards-compatible features added.
<green> : Patch version update. Backwards-compatible bug fixes.

You can upgrade packages to the latest version by passing the -u or -u:prompt option.
Elapsed: 00:00:03.4100881

With the change, the output is the following:

❯ dotnet outdated --pre-release:Never
» Website.Tests.Shared
  [net9.0]
  Microsoft.Playwright  1.46.0 -> 1.47.0

Version color legend:
<red>   : Major version update or pre-release version. Possible breaking changes.
<yellow>: Minor version update. Backwards-compatible features added.
<green> : Patch version update. Backwards-compatible bug fixes.

You can upgrade packages to the latest version by passing the -u or -u:prompt option.
Elapsed: 00:00:08.5505735

[martincostello]

Also includes a change to improve the error if run on a project with NU1604 warnings:

❯ dotnet outdated -u
Analyzing dependencies...Unhandled exception. System.ArgumentNullException: Parameter 'minVersion' cannot be null when parameter 'floatRange' is not null. (Parameter 'minVersion')
   at NuGet.Versioning.VersionRange..ctor(NuGetVersion minVersion, Boolean includeMinVersion, NuGetVersion maxVersion, Boolean includeMaxVersion, FloatRange floatRange, String originalString)
   at NuGet.Versioning.VersionRange..ctor(VersionRange range, FloatRange floatRange)
   at DotNetOutdated.Core.Services.NuGetPackageResolutionService.ResolvePackageVersions(String packageName, NuGetVersion referencedVersion, IEnumerable`1 sources, VersionRange currentVersionRange, VersionLock versionLock, PrereleaseReporting prerelease, String prereleaseLabel, NuGetFramework targetFrameworkName, String projectFilePath, Boolean isDevelopmentDependency, Int32 olderThanDays, Boolean ignoreFailedSources) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated.Core/Services/NuGetPackageResolutionService.cs:line 98
   at DotNetOutdated.Program.AddOutdatedDependencyIfNeeded(Project project, TargetFramework targetFramework, Dependency dependency, ConcurrentBag`1 outdatedDependencies) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated/Program.cs:line 504
   at DotNetOutdated.Program.AddOutdatedFrameworkIfNeeded(TargetFramework targetFramework, Project project, ConcurrentBag`1 outdatedFrameworks) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated/Program.cs:line 491
   at DotNetOutdated.Program.AddOutdatedProjectsIfNeeded(Project project, ConcurrentBag`1 outdatedProjects) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated/Program.cs:line 460
   at DotNetOutdated.Program.AnalyzeDependencies(List`1 projects, IConsole console) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated/Program.cs:line 425
   at DotNetOutdated.Program.OnExecute(CommandLineApplication app, IConsole console) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated/Program.cs:line 198
   at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.InvokeAsync(MethodInfo method, Object instance, Object[] arguments)
   at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.OnExecute(ConventionContext context, CancellationToken cancellationToken)
   at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.<>c__DisplayClass0_0.<<Apply>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync(String[] args, CancellationToken cancellationToken)
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
   at DotNetOutdated.Program.Main(String[] args) in /home/runner/work/dotnet-outdated/dotnet-outdated/src/DotNetOutdated/Program.cs:line 141