Add MSVC and macOS coverage

[amyspark]

Detailed description

This PR implements CI support for MSVC, Apple Xcode, and Homebrewed GCC for macOS.

For the latter two, dependencies are fetched from Homebrew as:

• libftdi depends on boost and others to be built from scratch
• GCC cannot build hidapi due to extensive usage of Objective-C constructs

This PR also includes the relevant fixes to make MSVC builds happy, in particular around standards compliance (#1742).

I'm open to any feedback. Let me know what you think!

Your checklist for this pull request

• I've read the Code of Conduct
• I've read the guidelines for contributing to this repository
• It builds for hardware native (see Building the firmware)
• It builds as BMDA (see Building the BMDA)
• I've tested it to the best of my ability
• My commit messages provide a useful short description of what the commits do

Closing issues

[dragonmux]

Only got a couple of notes as this all looks pretty great - with them addressed, this looks good to merge.

[amyspark]

@dragonmux thanks for the comments! Bits should've been addressed now.

[dragonmux]

LGTM, merging. Thank you for the contribution!