Missing stylesheet resource

[jimjamz]

Describe the bug
The script, package-extension.sh does not run successfully because the file, src/stylesheet.css does not exist.
To Reproduce
Steps to reproduce the behavior:

1. Clone the repo.
2. Run the installation script as recommended, ./package-extension.sh
   The following error occurs during the running of the script:
   cp: cannot stat 'src/stylesheet.css': No such file or directory

Expected behavior
The script should run successfully.

Screenshots
N/A

Environment (please complete the following information):

• Distro: Debian 12
• Gnome version:43.9

Additional context
The src/stylesheet.css file is missing. It is still available in the original repo, which this repo was forked from.