add families

src/main/java/com/faf223/expensetrackerfaf/dto/FamilyDTO.java

@@ -0,0 +1,14 @@
+package com.faf223.expensetrackerfaf.dto;
+
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotNull;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class FamilyDTO {
+    @NotNull(message = "Name must not be null")
+    @NotEmpty(message = "Name must not be empty")
+    private String name;
+}