feat(deps): add .NET 11 target support

[ncipollina]

Summary

Add net11.0 to the library and test project target frameworks, and align the repository's package and GitHub workflow configuration with that support. This keeps local builds, CI, and package metadata in sync as the project expands framework coverage.

Changes

• add net11.0 to src/LayeredCraft.Logging.CompactJsonFormatter.csproj and test/LayeredCraft.Logging.CompactJsonFormatter.Tests.csproj
• update .github/workflows/build.yaml and .github/workflows/pr-build.yaml to use LayeredCraft/devops-templates v7.6 and include .NET 11
• refresh package versions in Directory.Packages.props
• bump VersionPrefix to 1.1.0 in Directory.Build.props

Validation

• dotnet build
• dotnet run --project test --framework net8.0
• dotnet run --project test --framework net9.0
• dotnet run --project test --framework net10.0
• dotnet run --project test --framework net11.0

Release Notes

Add .NET 11 targeting support and update the repository's build/test dependencies to match.

[j-d-ha]

lgtm