Extensible, evenly spaced waybar styling (#156)

* Add override to only require one network interface online

* refactor: extensible, evenly spaced waybar style.css

- Use @define-color directive to define colour variables for each theme
(@foreground for text, @background for background-color)
- apply the colour variables in the main theme config, making it more
extensible
- make waybar elements more evenly spaced with consistent margin and
padding values
- add migration to apply the above changes to existing users

* Update style.css

better pixel spacing

---------

Co-authored-by: Ryan Hughes <1630358+ryanrhughes@users.noreply.github.com>
Co-authored-by: David Heinemeier Hansson <david@hey.com>

install/network.sh

@@ -4,3 +4,13 @@ if ! command -v iwd &>/dev/null; then
   yay -S --noconfirm --needed iwd
   sudo systemctl enable --now iwd.service
 fi
+
+# Fix systemd-networkd-wait-online timeout for multiple interfaces
+# Wait for any interface to be online rather than all interfaces
+# https://wiki.archlinux.org/title/Systemd-networkd#Multiple_interfaces_that_are_not_connected_all_the_time
+sudo mkdir -p /etc/systemd/system/systemd-networkd-wait-online.service.d
+sudo tee /etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf >/dev/null <<EOF
+[Service]
+ExecStart=
+ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --any
+EOF