epm play: add Simplenote-linux (eterbug #17493)

play.d/simplenote.sh

+#!/bin/sh
+
+PKGNAME=Simplenote-linux
+SUPPORTEDARCHES="x86_64 aarch64 armhf"
+VERSION="2.21.0"
+DESCRIPTION='A Simplenote React client packaged in Electron.'
+URL="https://github.com/Automattic/simplenote-electron"
+
+. $(dirname $0)/common.sh
+
+warn_version_is_not_supported
+
+case "$(epm print info -a)" in
+    x86_64)
+        arch="x86_64" ;;
+    aarch64)
+        arch="arm64" ;;
+    armhf)
+        arch="armv7l" ;;
+esac
+
+PKGURL="https://github.com/Automattic/simplenote-electron/releases/download/v$VERSION/$PKGNAME-$VERSION-$arch.AppImage"
+
+install_pkgurl