Add CI and release workflows for Pinget

[Marc-André Moreau (mamoreau-devolutions)]

Summary

• add CI and release workflows for the Rust and C# Pinget ports
• build and publish C# NuGet packages through artifacts, and add a separate PowerShell module release artifact
• expand Rust release packaging to Linux, Windows, and macOS on x64 and arm64, and update workflow actions to current versions

Validation

• dry-run release workflow succeeded on GitHub: 24917289954
• PowerShell module artifact uploaded successfully in the dry run
• local packaging validation confirmed the cmdlets .nupkg contains Pinget.psd1 and Format.ps1xml