gha: add workflow_dispatch

gha: add workflow_dispatch

Install filesystem first to work around some missing dependencies

Install filesystem first to work around some missing dependencies

Clean up CI an switch to the official installer as base

Clean up CI an switch to the official installer as base

Add a 7zip based sfx archive

Merge pull request msys2#1 from MaartenBent/start-menu-icons

Add icons to start-menu shortcuts

Add a README