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/qttranslations/qttranslations-6.9.9999.ebuild

@@ -0,0 +1,16 @@
+# Copyright 2021-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+QT6_RESTRICT_TESTS=1 # no tests
+inherit qt6-build
+
+DESCRIPTION="Translation files for the Qt6 framework"
+
+if [[ ${QT6_BUILD_TYPE} == release ]]; then
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+DEPEND="~dev-qt/qtbase-${PV}:6"
+BDEPEND="~dev-qt/qttools-${PV}:6[linguist]"