feat: scripts - ddcutil script to handle brightness control for exterrnal monitors

[Melk0rr]

A new script based on the default brightnesscontrol.sh but using ddcutil to control the brightness of external monitors.

The main issue is : DDC/CI protocol is slow

Pull Request

Description

• This script tries to achieve what the original brightnesscontrol script does with brightnessctl but for external monitors
• As I use 3 external monitors, I lacked a utility to easily change brightness. So here it is
• Dependencies: ddcutil only
• Related issue

Type of change

Please put an x in the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (non-breaking change; modified files are limited to the documentations)
• Technical debt (a code change that does not fix a bug or add a feature but makes something clearer for devs)
• Other (provide details below)

Checklist

Please put an x in the boxes that apply:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My commit message follows the commit guidelines.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added a changelog entry.
• I have added necessary comments/documentation to my code.
• I have added tests to cover my changes.
• I have tested my code locally and it works as expected.
• All new and existing tests passed.

Screenshots

Additional context