Added sddmwall.sh

[AfthabEK]

Pull Request

Description

Please read these instructions and remove unnecessary text.

• I have made added back the sddwall.sh script, which is used to set the current wallpaper as the login screen wallpaper
• I noticed that it was missing, even though discussions mentioned it. I got a solution from mrdpedd in the discussion here
• No new dependencies are required for this change

Type of change

Please put an x in the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• [x ] 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:

• [x ] I have read the CONTRIBUTING document.
• [x ] My code follows the code style of this project.
• [ ]x 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.
• [ x] I have added necessary comments/documentation to my code.
• I have added tests to cover my changes.
• [ x] I have tested my code locally and it works as expected.
• All new and existing tests passed.

Screenshots

(if appropriate)

Additional context

Add any other context about the problem here.

[mahaveergurjar]

This script now not working for change the sddm wallpaper because now tha wallpaper are not in swww directory