Add software items to install/remove Plex Media Server, Emby Server and Docker

[igorpecovnik]

Description

Add software items to install/remove Plex Media Server, Emby Server and Docker

Implementation Details

Add sub menu under Software, SW01.4 - Softy - 3rd party apps:
Add menu items with appropriate visibility:
SW22 - Install Plex Media server
SW23 - Remove Plex Media server
SW23 - Install Emby server
SW24 - Remove Emby server
SW25 - Install Docker Minimal
SW26 - Install Docker Engine
SW27 - Remove Docker
SW28 - Purge all Docker images, containers, and volumes

Added function modules into config.ng.software.sh
install_plexmediaserver
install_embyserver
install_docker

• Key changes introduced by this PR
• Justification for the changes
• Confirmation that no new external dependencies or modules have been introduced

Documentation Summary

• Metadata Included:

• Document Generated:

Testing Procedure

All new menu items tested successfully on:

• Test 1: UEFIx86 2GB Armbian 24.08.0 Bookworm
• Test 2: Pine64 1GB Armbian 23.02.0 Focal
• Test 3: Opizero+ 512MB Armbian 22.05.3 Jammy
• Test 4: Rock-5C 32GB Armbian 24.11.0 Noble

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have ensured that my changes do not introduce new warnings or errors
• No new external dependencies are included
• Changes have been tested and verified
• I have included necessary metadata in the code, including associative arrays