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/qtwidgets/qtwidgets-5.15.17.ebuild

@@ -0,0 +1,63 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+QT5_MODULE="qtbase"
+inherit qt5-build
+
+DESCRIPTION="Set of components for creating classic desktop-style UIs for the Qt5 framework"
+
+# keep IUSE defaults in sync with qtgui
+IUSE="dbus gles2-only gtk +png +X"
+REQUIRED_USE="gtk? ( dbus )"
+
+DEPEND="
+	=dev-qt/qtcore-${QT5_PV}*:5=
+	=dev-qt/qtgui-${QT5_PV}*:5=[gles2-only=,png=,X?]
+	dbus? ( =dev-qt/qtdbus-${QT5_PV}* )
+	gtk? (
+		dev-libs/glib:2
+		=dev-qt/qtgui-${QT5_PV}*:5=[dbus]
+		x11-libs/gtk+:3[X]
+		x11-libs/libX11
+		x11-libs/pango
+	)
+"
+RDEPEND="${DEPEND}"
+
+QT5_TARGET_SUBDIRS=(
+	src/tools/uic
+	src/widgets
+	src/plugins/platformthemes
+)
+
+QT5_GENTOO_CONFIG=(
+	dbus:xdgdesktopportal:
+	gtk:gtk3:
+	::widgets
+	!:no-widgets:
+)
+
+QT5_GENTOO_PRIVATE_CONFIG=(
+	:widgets
+)
+
+src_configure() {
+	local myconf=(
+		-opengl $(usex gles2-only es2 desktop)
+		$(usev dbus -dbus-linked)
+		$(qt_use gtk)
+		-gui
+		$(qt_use png libpng system)
+		-widgets
+		$(qt_use X xcb)
+		$(usev X '-xcb-xlib -xkbcommon')
+	)
+	qt5-build_src_configure
+}