docs: update the wiki for 1.0.0-beta.6: new pages, screenshots and corrections
docs: releasing with Sparkle updates, pre-releases, the appcast and deltas
docs: the repository is now open-wallpaper-engine-mac
docs: standard Markdown links everywhere, and link the Steam login mentions
docs: link repo files on the feature branch, the dark app icon on Home, and fix a dead profile link
docs: Open Wallpaper Engine wiki (user and developer guides)