chore(lfs): track wallpaper collection as LFS; wallpapers move into repo tree under noctalia data path

.githooks/pre-push

@@ -0,0 +1,6 @@
+#!/bin/sh
+# git-lfs pre-push — required because core.hooksPath=.githooks disables the
+# default .git/hooks/pre-push; without this hook, pushes would upload LFS
+# pointer files without their objects and break every fresh clone.
+command -v git-lfs >/dev/null 2>&1 || { printf >&2 'n' ; exit 0; }
+git lfs pre-push "$@"