Menu bar style with per-workspace app icons

[kim-raaschou]

I would like to propose a new i3OrderedWithAppIcons menu bar style that displays app icons inline after each workspace number.

This extends the existing i3Ordered style with a lightweight visual overview of what’s running on each workspace - directly from the menu bar.

Behavior
• The focused window is shown with full opacity and a subtle border.
• Non-focused applications are dimmed to 0.5 opacity.

Implementation (PR: #1952)
• 3 files changed (~90 lines)
• No new files
• No new dependencies
• Zero runtime cost when other styles are active (fully gated)
• Reuses existing i3Ordered logic - shared helper
• Follows the Experimental UI Settings pattern

I am happy to adjust the approach based on feedback.
Would this align with the project’s overall direction?