Add ddcctl

[Mosallamy]

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Types of Changes

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• [x] New addition to list
• [ ] Fixing bug in existing item in list
• [ ] Removing item from list
• [ ] Changing structure (organization) of list

Proposed Changes

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ddcctl is terminal based toll that gives you the ability to adjust your external monitors' built-in controls. Available controls such as:

• brightness
• contrast
• input source
• built-in speaker volume
• on/off/standby
• rgb colors
• color presets
• reset

PR Checklist

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• [x] I have read the CONTRIBUTING guide
• [x] I have explained why this PR is important
• [x] I have added necessary documentation (if appropriate)

Further Comments

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