Add automation for testing commands on multiple OS

[igorpecovnik]

Description

This action will execute tests defined in tests/ folder. Tests will be run in Debian Bookworm, Debian Trixie, Ubuntu Jammy and Ubuntu Noble Docker containers in parallel.

Implementation Details

Filename represent armbian-config command ID.

Test config example:

ENABLED=true
RELEASE=noble:bookworm
CONDITION="[ -f /usr/bin/zsh ]"

Test will succeeds if CONDITION return true. If condition is not set, test is successful if it finished the job without errors.

Testing Procedure

• test routine can be executed manually
• it will run on push
• it will run on cron

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
• Changes have been tested and verified
• I have included necessary metadata in the code, including associative arrays