feat(falukant): add age information to lovers in family view

- Updated FalukantService to include age details for partners in relationships.
- Added translations for 'age' in English, German, and Spanish localization files.
- Enhanced FamilyView component to display age information for lovers and candidates, improving user experience.

backend/services/falukantService.js

@@ -3542,6 +3542,7 @@ class FalukantService extends BaseService {
                 return {
                     relationshipId: r.id,
                     name: partner.firstName || 'Unknown',
+                    age: partner.age != null ? partner.age : null,
                     gender: partner.gender || null,
                     title: partner.nobleTitle || '',
                     role: state.loverRole || 'lover',