Add workflow to build and test dotnet:10 unikernel

[Copilot]

Create workflow for building and testing Unikernel image from library/dotnet/10

Plan:

• Create .github/workflows/library-dotnet10.yaml workflow file
• Configure build job with matrix for qemu/x86_64 and fc/x86_64 platforms
• Add execute flag for qemu/x86_64 to test the unikernel
• Configure push job for merging and pushing OCI digests
• Set up proper triggers (push, PR, schedule, workflow_dispatch, repository_dispatch)
• Validate YAML syntax
• Add explicit permissions blocks for security (contents:read, packages:write)
• Pass CodeQL security analysis (0 alerts)
• Fix Dockerfile to install native build tools (clang, zlib1g-dev) for AOT compilation

✅ Completed

The workflow includes:

• Build job that compiles the unikernel for qemu/x86_64 and fc/x86_64
• Automatic execution/testing on qemu/x86_64 platform using the execute flag
• Push job to merge and push OCI digests to the registry
• Triggers for push, PR, schedule, manual dispatch, and repository dispatch events
• Concurrency control to cancel in-progress actions
• Explicit permissions following principle of least privilege
• Successfully passed security analysis
• Dockerfile updated to install native build tools required for .NET Native AOT compilation

Original prompt

Create a workflow that would build and test Unikernel image from library/dotnet/10

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[reedz]

@copilot build is failing with " i 8.203 /root/.nuget/packages/microsoft.dotnet.ilcompiler/10.0.0-preview.7.25380.108/build/Microsoft.NETCore.Native.Unix.targets(314,5): error : Platform linker ('clang' or 'gcc') not found in PATH. Ensure you have all the required prerequisites documented at https://aka.ms/nativeaot-prerequisites. [/src/SimpleHttpServer.csproj]"

[Copilot]

@copilot build is failing with " i 8.203 /root/.nuget/packages/microsoft.dotnet.ilcompiler/10.0.0-preview.7.25380.108/build/Microsoft.NETCore.Native.Unix.targets(314,5): error : Platform linker ('cla...

Fixed in 113a97d. The Dockerfile now installs clang and zlib1g-dev, which are required for .NET Native AOT compilation.