This pull request introduces several improvements to theming and dynamic resource usage for UI elements, with a focus on making colors and styles adapt automatically to the current theme. The changes primarily affect how foreground and background colors are applied to log output, icons, and info bars, increasing consistency and maintainability across light and dark themes.

Theming and dynamic resource improvements:

• The OperationOutputViewModel now uses theme-aware brushes for log output lines, looking up resources like StatusErrorForeground and LogOutputVerboseForeground instead of hardcoded colors. This ensures log output colors adapt to the current theme. (issue [BUG] Avalonia Windows: Update operation popup has poor text contrast #4681)
• The SvgIcon control has been updated to automatically select an appropriate foreground color based on the current theme unless explicitly set, and now listens for theme changes to update its appearance dynamically.
• The main window now uses a dynamic resource for icon foregrounds (AppIconForeground) instead of a hardcoded color, improving theme consistency.

InfoBar styling simplification:

• InfoBar background and border colors are now set using style classes and dynamic resources, rather than being updated manually in code. This makes theme changes seamless and reduces code complexity. [

Code cleanup:

• Removes an unnecessary hardcoded foreground color in the OperationViewModel menu icon, allowing it to inherit the correct color from the theme.