UI improvements

[praveenax]

This PR makes major improvements to the visual styling and accessibility of the WoofJS editor and workflow pages.

UI modernization and improved styling (create.html):

Workflow page utility classes and layout improvements (workflow.html):

• Introduced reusable CSS utility classes to simplify layout and styling.
• Added accessibility improvements such as alt attributes to icons in workflow merge buttons.
• Cleaned up inline styles by replacing them with utility classes where possible, improving readability and maintainability.

These changes collectively enhance the visual polish, usability, and accessibility of the WoofJS editor and workflow pages.