Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qtsvg/qtsvg-5.15.17.ebuild

@@ -0,0 +1,25 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+inherit qt5-build
+
+DESCRIPTION="SVG rendering library for the Qt5 framework"
+
+IUSE=""
+
+RDEPEND="
+	=dev-qt/qtcore-${QT5_PV}*
+	=dev-qt/qtgui-${QT5_PV}*
+	=dev-qt/qtwidgets-${QT5_PV}*
+	sys-libs/zlib:=
+"
+DEPEND="${RDEPEND}
+	test? ( =dev-qt/qtxml-${QT5_PV}* )
+"