refactor: group stow packages into common, mac and kde

Split the packages by platform so each app stays an opt-in Stow package
under common/, mac/ or kde/. KDE gets its own Fastfetch, Helium and
Spectacle packages, and darwin-breeze becomes kde/theme. The READMEs
document stowing a whole group as well as individual packages.

kde/spectacle/.local/share/applications/org.kde.spectacle.desktop

@@ -0,0 +1,61 @@
+[Desktop Entry]
+GenericName=Screenshot Capture Utility
+Name=Spectacle
+Comment=Take screenshots and screen recordings
+Categories=Qt;KDE;Utility;
+Keywords=snapshot;capture;print;screenshot;snipping;snipping tool;snip;
+Exec=/usr/bin/spectacle --background --region --copy-image
+Icon=spectacle
+Type=Application
+StartupNotify=false
+Actions=FullScreenScreenShot;CurrentMonitorScreenShot;ActiveWindowScreenShot;RectangularRegionScreenShot;WindowUnderCursorScreenShot;RecordRegion;RecordScreen;RecordWindow;OpenWithoutScreenshot;
+DBusActivatable=false
+X-DBUS-StartupType=Unique
+X-DBUS-ServiceName=org.kde.Spectacle
+X-KDE-Shortcuts=Print,Meta+Shift+S
+X-KDE-DBUS-Restricted-Interfaces=org.kde.KWin.ScreenShot2
+X-KDE-Wayland-Interfaces=org_kde_plasma_window_management,zkde_screencast_unstable_v1
+
+[Desktop Action FullScreenScreenShot]
+Name=Capture Entire Desktop
+Exec=/usr/bin/spectacle --background --copy-image -f
+X-KDE-Shortcuts=Shift+Print
+
+[Desktop Action CurrentMonitorScreenShot]
+Name=Capture Current Monitor
+Exec=/usr/bin/spectacle --background --copy-image -m
+
+
+[Desktop Action ActiveWindowScreenShot]
+Name=Capture Active Window
+Exec=/usr/bin/spectacle --background --copy-image -a
+X-KDE-Shortcuts=Meta+Print
+
+[Desktop Action RectangularRegionScreenShot]
+Name=Capture Rectangular Region
+Exec=/usr/bin/spectacle --background --copy-image -r
+X-KDE-Shortcuts=Meta+Shift+Print
+
+[Desktop Action WindowUnderCursorScreenShot]
+Name=Capture Window Under Cursor
+Exec=/usr/bin/spectacle --background --copy-image -u
+X-KDE-Shortcuts=Meta+Ctrl+Print
+
+[Desktop Action RecordRegion]
+Name=Start/Stop Region Recording
+Exec=/usr/bin/spectacle -R region
+X-KDE-Shortcuts=Meta+Shift+R,Meta+R
+
+[Desktop Action RecordScreen]
+Name=Start/Stop Screen Recording
+Exec=/usr/bin/spectacle -R screen
+X-KDE-Shortcuts=Meta+Alt+R
+
+[Desktop Action RecordWindow]
+Name=Start/Stop Window Recording
+Exec=/usr/bin/spectacle -R window
+X-KDE-Shortcuts=Meta+Ctrl+R
+
+[Desktop Action OpenWithoutScreenshot]
+Name=Launch without taking a screenshot
+Exec=/usr/bin/spectacle -l