Enhance: Premium RelationshipEditorWindow with colored borders and tooltips

- Add colored borders matching icon colors for all 16 relationship types
- Implement smart tooltip positioning (left/center/right based on column)
- Update selected text color to match icon color
- Modernize window buttons with color-coded hover states (teal/rose)
- Add icon scale animations and premium hover effects
- Increase spacing between icon and text (gap-4)
- Add bottom padding for better visual balance (pb-8)
- Update background to solid dark theme matching context menu
- All borders now match their respective icon colors at 40% opacity

Author: Patel230