Implemented project handling and updated property components according to front-end needs

src/main/java/de/iwomm/propify_api/entity/Property.java

@@ -1,8 +1,10 @@
 package de.iwomm.propify_api.entity;
 
+import com.fasterxml.jackson.annotation.JsonBackReference;
 import jakarta.persistence.*;
 
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
 
@@ -41,6 +43,19 @@ public class Property {
 
     private LocalDateTime updatedAt;
 
+    @OneToMany(mappedBy = "property", cascade = CascadeType.PERSIST, orphanRemoval = true)
+    @OrderBy("createdAt")
+    @JsonBackReference
+    private List<Project> projects = new ArrayList<>();
+
+    public List<Project> getProjects() {
+        return projects;
+    }
+
+    public void setProjects(List<Project> projects) {
+        this.projects = projects;
+    }
+
     public List<Attachment> getAttachments() {
         return attachments;
     }