Moving Icons away from CC BY-ND 3.0 for FOSS packaging purposes

I've seen some comments stating that sharing pre-compiled packages
of yuzu is problematic for linux distributions due to some contents
having license of CC BY-ND 3.0

Better licensed sources of icons have been found for most cases,
see the changes to the .reuse/dep5 file for details.

Placeholders for connected/disconnected icons

At the time of writing I consider these icons to be placeholders,
hence three copies. colorful is grey, default is black, qdarkstyle is white

connected is gnome/16x16/network-idle.png with no changes
connected_notification is gnome/16x16/network-error.png with changes
disconnected is gnome/16x16/network-offline.png with changes

Looking at licenses: GNOME icon theme is distributed under the terms of either
GNU LGPL v.3 or Creative Commons BY-SA 3.0 license.

Debian appears to explicitly state they're licensing under
Creative Commons Attribution-Share Alike 3.0

From a tarball at the following link suggests we can just attribute GNOME Project
https://download.gnome.org/sources/gnome-icon-theme/

When attributing the artwork, using "GNOME Project" is enough.
Please link to http://www.gnome.org where available.

CC-BY-SA-3.0.txt from https://creativecommons.org/licenses/by-sa/3.0/legalcode.txt

1 files changed, 0 insertions, 0 deletions

diff --git a/dist/qt_themes/default/icons/48x48/sd_card.png b/dist/qt_themes/default/icons/48x48/sd_card.png
index edacaeeb5..60dfba269 100644
--- a/dist/qt_themes/default/icons/48x48/sd_card.png
+++ b/dist/qt_themes/default/icons/48x48/sd_card.png