feat(cli): add progress checklist

[iamr8]

Summary

• replace scan and check progress bars with a per-category checklist
• add waiting, scanning, checking, completed, and failed color states
• add scanner-specific labels, counts, and checklist state tests
• bump VERSION to 0.0.15-beta

Testing

• dotnet build
• dotnet test --project apps.Tests/apps.Tests.csproj --no-build
• dotnet run --project apps/apps.csproj --no-build -- -a
• pseudo-terminal ANSI state verification