Add GitHub Actions workflow to build storj uplink-c artifacts

[TopperDEL]

Summary

• add a reusable GitHub Actions workflow that builds storj/uplink-c native libraries across Windows, Linux, and macOS architectures
• install Zig where needed and compile both shared and static artifacts for each OS/architecture combination
• upload the generated binaries as workflow artifacts for subsequent steps

Testing

• not run (GitHub Actions workflow)

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https://chatgpt.com/codex/tasks/task_b_68e3a928da0c8326954d5bd52faad620

[Copilot]

Pull Request Overview

This PR adds a comprehensive GitHub Actions workflow to automate building of storj/uplink-c native libraries across multiple platforms and architectures. The workflow supports cross-compilation for Windows, Linux, and macOS using Zig for non-native compilation where needed.

• Introduces a matrix build strategy covering Windows (x86, x64, arm64), Linux (x86, x64), and macOS (x64, arm64)
• Sets up cross-compilation using Zig compiler for Windows and Linux targets
• Generates both shared and static library artifacts with appropriate file extensions per platform

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[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot

See analysis details on SonarQube Cloud