dev-cpp/magic_enum: new package, add 0.8.2

Needed for games-strategy/ja2-stracciatella in future, possibly. I packaged
this given I thought it was required but ended up finding it was toggled
on unnecessarily.

It's cheap to build and it's likely it'll be needed in future, so..

Signed-off-by: Sam James <sam@gentoo.org>

dev-cpp/magic_enum/Manifest

@@ -0,0 +1 @@
+DIST magic_enum-0.8.2.tar.gz 171915 BLAKE2B e8915aa7cafa9407d5d4ab3b6837fafde6b1cb75877c8b56f82568e6291ca317720950947b2dfc7e12ca459279ba4e809a8c5782fc04adc2d7636eddcb80122d SHA512 849c426484156faf91dde3f32f6c755c7698879b16dd83e13fb86b299b53ec9bbe4d55267581386302c8acb93d80ec044cc248371fdc8608cdd8f4ab12099f0a

dev-cpp/magic_enum/magic_enum-0.8.2.ebuild

@@ -0,0 +1,28 @@
+# Copyright 2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# As of 0.8.2, it has meson, but only for subproject use(?)
+# Doesn't install anything.
+inherit cmake
+
+DESCRIPTION="Static reflection for enums in header-only C++"
+HOMEPAGE="https://github.com/Neargye/magic_enum"
+SRC_URI="https://github.com/Neargye/magic_enum/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="test"
+# Tests fail to compile
+RESTRICT="!test? ( test ) test"
+
+src_configure() {
+	local mycmakeargs=(
+		-DMAGIC_ENUM_OPT_BUILD_TESTS=$(usex test)
+		-DMAGIC_ENUM_OPT_INSTALL=ON
+	)
+
+	cmake_src_configure
+}

dev-cpp/magic_enum/metadata.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>games@gentoo.org</email>
+		<name>Gentoo Games Project</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">Neargye/magic_enum</remote-id>
+	</upstream>
+</pkgmetadata>