Fix dotnet tool release compatibility and bump to 0.6.0

[Marc-André Moreau (mamoreau-devolutions)]

Summary

• replace the .NET 10 RID-specific tool package with a classic net8-compatible dotnet tool package
• add CI and release smoke tests that install and run the tool on .NET 8 and .NET 10
• bump cirup package versions and NuGet default package versions to 0.6.0

Validation

• cargo test --workspace
• local dotnet tool pack/install smoke tests on .NET 8 and .NET 10
• release workflow dry run: actions/runs/22882409184

[Marc-André Moreau (mamoreau-devolutions)]

Copilot try installing the tool from nuget.org, it failed for me with 0.5.0 when it worked with 0.4.0. I'm skeptical of the downgrade to net8 because I thought the rid specific packages required net10. The older package used net10 and worked. Investiafe and tell me what's truly change and why it apparently broke after publishing 0.5.0. compare the packages with 0.4.0

[Copilot]

Marc-André Moreau (@mamoreau-devolutions) I've opened a new pull request, #25, to work on those changes. Once the pull request is ready, I'll request review from you.