Windows installer

[zmughal]

Examples:

• https://github.com/oberth-manoeuvre/release/tree/master/dev/ci
• https://www.gramps-project.org/wiki/index.php/Gramps_for_Windows_with_MSYS2
• https://photini.readthedocs.io/en/latest/other/installation.html
• https://github.com/geany/geany/blob/master/scripts/gtk-bundle-from-msys2.sh
• https://github.com/clutter-project/clutter-msi
• https://github.com/jtanx/fontforgebuilds
• https://github.com/exaile/python-gtk3-gst-sdk
• https://github.com/oneclick/rubyinstaller2
• https://github.com/r-windows/rtools-installer, https://jeroen.github.io/dsc2019/#1
• https://github.com/achadwick/styrene
• https://github.com/git-for-windows/build-extra
• https://github.com/Krakonos/msysww
• https://github.com/quodlibet/quodlibet/tree/master/win_installer
• https://github.com/KiCad/kicad-winbuilder
• https://github.com/slowphil/texmacs-win-builder
• https://github.com/msys2/msys2/wiki/Distributing
• https://stackoverflow.com/questions/49092784/how-to-distribute-a-gtk-application-on-windows
• https://wiki.inkscape.org/wiki/index.php/Compiling_Inkscape_on_Windows_with_MSYS2
• https://github.com/mojofunk/mingw-pkg
• https://pygobject.readthedocs.io/en/latest/guide/deploy.html
• https://kdenlive.org/en/2019/01/building-and-distributing-kdenlive-on-windows-and-mac/, https://mxe.cc/
• https://github.com/tschoonj/GTK-for-Windows-Runtime-Environment-Installer