style: format code with Prettier

PR Summary

Improved Readability in 'findbar.css' The style instructions for certain elements in 'findbar.css' have been broken down into multiple lines. This makes the code easier to understand and troubleshoot.
Modification in Sidebar Styling The color value of border elements within 'sidebery.css' has been updated. This represents a minor change in the appearance of the sidebar and header.
Enhanced Readability in 'animations.css' The instructions for the 'neon' keyframe animation within 'animations.css' have been arranged into multiple lines. This modification facilitates easier code comprehension.
End of Line added in 'toolbar.css' A new line was added to the end of 'toolbar.css'. This is a coding convention that ensures the file reads correctly across different text editors and development environments.