dev-python/cwcwidth: New package (Cython version of wcwidth)

Add the Cython alternative to dev-python/wcwidth, that uses the libc
functions.  It is a new dependency of dev-python/curtsies.

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/cwcwidth/Manifest

@@ -0,0 +1 @@
+DIST cwcwidth-0.1.1.gh.tar.gz 9054 BLAKE2B fb907d467a143851cc000061f9787f032788d7b684307341208ed498ade160bcd01d372ee2281fde7d1e1561aaa309d6d0bf9b776abaaef042f8b22e9df8d948 SHA512 b025af3a21d22634fe154f32fdbf380eb56d085e247147b2d0031ca36ef9d8de68aaae8133e611ec3bb36e2bc69f384e3dc23654abde2cb8b715305ba26cb66d

dev-python/cwcwidth/cwcwidth-0.1.1.ebuild

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+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{7..9} )
+inherit distutils-r1
+
+DESCRIPTION="Python bindings for wc(s)width"
+HOMEPAGE="
+	https://github.com/sebastinas/cwcwidth/
+	https://pypi.org/project/cwcwidth/"
+SRC_URI="
+	https://github.com/sebastinas/cwcwidth/archive/v${PV}.tar.gz
+		-> ${P}.gh.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+BDEPEND="
+	dev-python/cython[${PYTHON_USEDEP}]"
+
+distutils_enable_tests unittest
+
+src_test() {
+	cd tests || die
+	distutils-r1_src_test
+}

dev-python/cwcwidth/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>python@gentoo.org</email>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">sebastinas/cwcwidth</remote-id>
+		<remote-id type="pypi">cwcwidth</remote-id>
+	</upstream>
+</pkgmetadata>