dev-python/editables: Add from Gentoo

It's from Gentoo commit 092bc5973a62fd0882f07b0fca044af8d0bcfacb.

sdk_container/src/third_party/portage-stable/dev-python/editables/Manifest

@@ -0,0 +1 @@
+DIST editables-0.5.gh.tar.gz 15469 BLAKE2B 9bbbc61a4e0a57edc6b7ba463da0d6c2f40090e347e67f203f16163bec70b63a2289332e9d69a46919f8aa009be1ec96e1b1cd2708ce5eb6ab33af6eb36360e0 SHA512 ac39d2e6a51625697c517b85fec11b525b1a41f82cf4f55c7595fed19da867065a62eee5e3656706f7402d0499754f4a142da77d699c59dffc8b769fa1c3dbe2

sdk_container/src/third_party/portage-stable/dev-python/editables/editables-0.5.ebuild

@@ -0,0 +1,25 @@
+# Copyright 2022-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=flit
+PYTHON_COMPAT=( pypy3 python3_{10..12} )
+
+inherit distutils-r1
+
+DESCRIPTION="A Python library for creating 'editable wheels'"
+HOMEPAGE="
+	https://pypi.org/project/editables/
+	https://github.com/pfmoore/editables/
+"
+SRC_URI="
+	https://github.com/pfmoore/editables/archive/${PV}.tar.gz
+		-> ${P}.gh.tar.gz
+"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+
+distutils_enable_tests pytest

sdk_container/src/third_party/portage-stable/dev-python/editables/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>python@gentoo.org</email>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">pfmoore/editables</remote-id>
+		<remote-id type="pypi">editables</remote-id>
+	</upstream>
+</pkgmetadata>