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/qtserialport/Manifest

@@ -0,0 +1,2 @@
+DIST qtserialport-everywhere-src-6.10.3.tar.xz 263932 BLAKE2B a87223f4336f335d7c43ff5b1474c665d4bfed2de7c2631e2e88496f2d6bc90a8f78e91d529486faf41b85a334ec7b537c9907c7848688735e7882e532d902bc SHA512 1df581da375ae8ccaa441e1bfd963594836aaf42623339caf9d04ead12bf32e219ba9cc42545668c2d13df90f006217d11f41c1dcd37e02e42cdeb902e546872
+DIST qtserialport-everywhere-src-6.11.1.tar.xz 264092 BLAKE2B 41fb774700e757ce376f07e3069a265201acac3b62e28f5877b18648bbf8870937bfcf55ce918c25149475c4af88ff888c1630c7ddd6a9926bfd47cb5d1c7fce SHA512 6fcac1e82932a94b4a43c22268ea64f6d277507e08bbba89c803c8e7c16408d621e5c8ee11aaa829a4aaeae7ec1006a32b04980e7571098b3a8155a38d02d17a

dev-qt/qtserialport/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>qt@gentoo.org</email>
+		<name>Gentoo Qt Project</name>
+	</maintainer>
+	<upstream>
+		<bugs-to>https://qt-project.atlassian.net/</bugs-to>
+		<doc>https://doc.qt.io/</doc>
+		<remote-id type="github">qt/qtserialport</remote-id>
+	</upstream>
+	<slots>
+		<subslots>
+			Must only be used by packages that are known to use private parts of the Qt API.
+		</subslots>
+	</slots>
+</pkgmetadata>

dev-qt/qtserialport/qtserialport-6.10.3.ebuild

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+# Copyright 2021-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit qt6-build
+
+DESCRIPTION="Serial port abstraction library for the Qt6 framework"
+
+if [[ ${QT6_BUILD_TYPE} == release ]]; then
+	KEYWORDS="amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv x86"
+fi
+
+RDEPEND="
+	~dev-qt/qtbase-${PV}:6
+	virtual/libudev:=
+"
+DEPEND="${RDEPEND}"

dev-qt/qtserialport/qtserialport-6.11.1.ebuild

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+# Copyright 2021-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit qt6-build
+
+DESCRIPTION="Serial port abstraction library for the Qt6 framework"
+
+if [[ ${QT6_BUILD_TYPE} == release ]]; then
+	KEYWORDS="amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv x86"
+fi
+
+RDEPEND="
+	~dev-qt/qtbase-${PV}:6
+	virtual/libudev:=
+"
+DEPEND="${RDEPEND}"

dev-qt/qtserialport/qtserialport-6.11.9999.ebuild

@@ -0,0 +1,18 @@
+# Copyright 2021-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit qt6-build
+
+DESCRIPTION="Serial port abstraction library for the Qt6 framework"
+
+if [[ ${QT6_BUILD_TYPE} == release ]]; then
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+RDEPEND="
+	~dev-qt/qtbase-${PV}:6
+	virtual/libudev:=
+"
+DEPEND="${RDEPEND}"

dev-qt/qtserialport/qtserialport-6.12.9999.ebuild

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+# Copyright 2021-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit qt6-build
+
+DESCRIPTION="Serial port abstraction library for the Qt6 framework"
+
+if [[ ${QT6_BUILD_TYPE} == release ]]; then
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+RDEPEND="
+	~dev-qt/qtbase-${PV}:6
+	virtual/libudev:=
+"
+DEPEND="${RDEPEND}"

dev-qt/qtserialport/qtserialport-6.9999.ebuild

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+# Copyright 2021-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit qt6-build
+
+DESCRIPTION="Serial port abstraction library for the Qt6 framework"
+
+if [[ ${QT6_BUILD_TYPE} == release ]]; then
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+RDEPEND="
+	~dev-qt/qtbase-${PV}:6
+	virtual/libudev:=
+"
+DEPEND="${RDEPEND}"