Improve MacOS packaging

[serafdev]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>EnvironmentVariables</key>
    <dict>
        <key></key>
        <string></string>
    </dict>
    <key>Label</key>
    <string>org.masjidsrobot.darsrec</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/local/bin/darsrec</string>
    </array>
    <key>KeepAlive</key>
    <true/>
    <key>StandardOutPath</key>
    <string>/tmp/darsrec.out</string>
    <key>StandardErrorPath</key>
    <string>/tmp/darsrec.err</string>
</dict>
</plist>

Currently hardcoded the above in ~/Library/LaunchAgents/org.masjidsrobot.darsrec.plist

Should find a better way with an install.sh script to do this automatically

This ticket includes signing the binary with Apple's Developpers - not sure about the process for non-mac users, got to investigate inchaAllah