meta: Add GNOME package

Since GNOME is configured through dconf and gsettings, it is easy to
write scripts for each group of settings that we want to change.

gnome/.config/gnome/antialiasing.sh

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+#!/bin/sh
+
+# Use the 'best' antialiasing settings for modern displays
+gsettings set org.gnome.settings-daemon.plugins.xsettings antialiasing rgba
+gsettings set org.gnome.settings-daemon.plugins.xsettings hinting full

gnome/.config/gnome/arc-dark-gtk-theme.sh

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+#!/bin/sh
+
+# Use the dark variant of the Arc GTK theme
+gsettings set org.gnome.desktop.interface gtk-theme Arc-Dark-solid
+gsettings set org.gnome.desktop.interface icon-theme Papirus-Dark

gnome/.config/gnome/breeze-cursor-theme.sh

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+#!/bin/sh
+
+# Use Plasma's default cursor theme in GNOME
+gsettings set org.gnome.desktop.interface cursor-theme breeze_cursors

gnome/.config/gnome/extensions.sh

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+#!/bin/sh
+
+# Use the Alternate Tab and Launch New Instance extensions
+gsettings set org.gnome.shell enabled-extensions "[
+  'alternate-tab@gnome-shell-extensions.gcampax.github.com',
+  'launch-new-instance@gnome-shell-extensions.gcampax.github.com'
+]"

gnome/.config/gnome/pop-gtk-theme.sh

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+#!/bin/sh
+
+# Use the light variant of the Pop GTK theme
+gsettings set org.gnome.desktop.interface gtk-theme Pop
+gsettings set org.gnome.desktop.interface icon-theme Pop

gnome/README.md

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+# GNOME
+
+[GNOME][gnome] is a simple desktop environment with X11 and Wayland support. It includes an interface that works well with touch devices.
+
+## Use Cases
+
+GNOME can be used to:
+
+- Have a desktop environment that just works, with no configuration necessary
+
+You should not use GNOME if:
+
+- You want to learn how X works behind the scenes
+- You want complete control of your desktop environment
+
+[gnome]: https://wiki.archlinux.org/index.php/GNOME