feat: support for macOS-14 and arm64 architecture

[perazz]

• add support for macos-14
• on binaries not available (arm64 macs, old fpm versions), fallback to building fpm from source

[Copilot]

Pull Request Overview

This PR adds support for macOS-14 (ARM64) and improves architecture handling by implementing a fallback mechanism to build fpm from source when pre-built binaries are unavailable.

• Adds architecture detection and mapping for ARM64 support
• Implements fallback to source compilation for ARM64 macOS when binaries aren't available
• Updates CI workflow to test macOS-14 and newer fpm versions

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
index.js	Adds architecture detection, updates filename generation for ARM64, and implements source compilation fallback with gfortran detection
.github/workflows/test-workflow.yml	Adds macOS-14 to test matrix, updates gcc version, and excludes incompatible version combinations

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[perazz]

will merge soon if there are no further comments.