feat(i18n): add PersonType and MAIDEN_NAME translation keys

Add translations for PersonType values (PERSON, INSTITUTION, GROUP,
UNKNOWN) and PersonNameAliasType.MAIDEN_NAME in de/en/es.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/messages/de.json

@@ -485,7 +485,12 @@
 	"person_alias_type_BIRTH": "geborene/r",
 	"person_alias_type_WIDOWED": "verwitwete/r",
 	"person_alias_type_DIVORCED": "geschiedene/r",
+	"person_alias_type_MAIDEN_NAME": "Geburtsname",
 	"person_alias_type_OTHER": "Sonstiger Name",
+	"person_type_PERSON": "Person",
+	"person_type_INSTITUTION": "Institution",
+	"person_type_GROUP": "Gruppe",
+	"person_type_UNKNOWN": "Unbekannt",
 	"person_alias_add_heading": "Name hinzufuegen",
 	"person_alias_label_type": "Art",
 	"person_alias_label_last_name": "Nachname",

frontend/messages/en.json

@@ -485,7 +485,12 @@
 	"person_alias_type_BIRTH": "Birth name",
 	"person_alias_type_WIDOWED": "Name as widow/widower",
 	"person_alias_type_DIVORCED": "Name after divorce",
+	"person_alias_type_MAIDEN_NAME": "Maiden name",
 	"person_alias_type_OTHER": "Other name",
+	"person_type_PERSON": "Person",
+	"person_type_INSTITUTION": "Institution",
+	"person_type_GROUP": "Group",
+	"person_type_UNKNOWN": "Unknown",
 	"person_alias_add_heading": "Add name",
 	"person_alias_label_type": "Type",
 	"person_alias_label_last_name": "Last name",

frontend/messages/es.json

@@ -485,7 +485,12 @@
 	"person_alias_type_BIRTH": "Nombre de nacimiento",
 	"person_alias_type_WIDOWED": "Nombre como viuda/viudo",
 	"person_alias_type_DIVORCED": "Nombre tras el divorcio",
+	"person_alias_type_MAIDEN_NAME": "Apellido de soltera",
 	"person_alias_type_OTHER": "Otro nombre",
+	"person_type_PERSON": "Persona",
+	"person_type_INSTITUTION": "Institución",
+	"person_type_GROUP": "Grupo",
+	"person_type_UNKNOWN": "Desconocido",
 	"person_alias_add_heading": "Agregar nombre",
 	"person_alias_label_type": "Tipo",
 	"person_alias_label_last_name": "Apellido",