epm play: added muffon (eterbug #18317)

play.d/muffon.sh

+#!/bin/sh
+
+PKGNAME=muffon
+SUPPORTEDARCHES="x86_64 aarch64"
+VERSION="$2"
+DESCRIPTION='muffon is a cross-platform music streaming client for desktop, which helps you listen to, discover and organize music in an advanced way.'
+URL="https://github.com/staniel359/muffon"
+
+. $(dirname $0)/common.sh
+
+arch="$(epm print info --distro-arch)"
+
+if [ "$VERSION" = "*" ] ; then
+    PKGURL=$(get_github_url "https://github.com/staniel359/muffon" "${PKGNAME}-${VERSION}-linux-$arch.AppImage")
+else
+    PKGURL="https://github.com/staniel359/muffon/releases/download/v$VERSION/${PKGNAME}-${VERSION}-linux-$arch.AppImage"
+fi
+
+install_pkgurl