feat: custom content type icons, built-in types, user lookup

internal/infrastructure/persistence/mappers/contentTypeMapper.go

@@ -15,6 +15,7 @@ func ContentTypeToDomain(m models.ContentType) (contenttype.ContentType, error)
 		ID:        m.ID,
 		Key:       m.Key,
 		Name:      m.Name,
+		Icon:      m.Icon,
 		Fields:    fields,
 		CreatedAt: m.CreatedAt,
 		UpdatedAt: m.UpdatedAt,
@@ -30,6 +31,7 @@ func ContentTypeToModel(c contenttype.ContentType) (models.ContentType, error) {
 		ID:        c.ID,
 		Key:       c.Key,
 		Name:      c.Name,
+		Icon:      c.Icon,
 		Fields:    string(fields),
 		CreatedAt: c.CreatedAt,
 		UpdatedAt: c.UpdatedAt,