Defines the editor UI color palette as constexpr ImGui color constants.

These colors include:

• Accent colors for buttons and highlights
• Background shades for panels and windows
• Text colors for readability and emphasis
• Special colors for different title bar states (edit, play, pause, launcher)
• Selection colors for active and muted states
• Error text coloring for user feedback

These constants allow compile-time inlining and easy future extension, such as switching to a dynamic color scheme or user-customizable themes.