Windows support

[lawmurray]

We'd like to support Windows. This is a ticket to consolidate prerequisites and solicit feedback from Windows users. If you have tested out on Windows or would like to have a go at one or more of these, please let us know here!

• Replace glob() #1
• Replace getopt_long() #2

[lawmurray]

Adding some packaging considerations for later:

• Chocolately,
• Conan,
• winget,
• perhaps vcpkg, although it seems mostly for libraries.

The easiest way forward might be to generate an NSIS installer with CPack (Doxide is already using CMake), which can be then be distributed separately, but also packaged for these package managers.

[lawmurray]

Prerequisites #1 and #2 above now resolved to remove Unix-specific dependencies.

[lawmurray]

Doxide now builds and runs on Windows with Visual Studio 2022 (as of commit c92f1b9). Further testing and packaging required.

[lawmurray]

NSIS installer for Windows now working via CPack.

[lawmurray]

...and we're out, v0.2.0 has Windows support, download here. A few nice-to-haves remain:

• Chocolatey package (Chocolatey package #14).
• Code signing the installer and program (Code signing installer and executable on Windows #15).

Closing as the primary mission is accomplished 🎉