feat: added delete endpoints for lists and list items

internal/repository/list.go

@@ -59,6 +59,15 @@ func (r *ListRepo) CreateList(ctx context.Context, name string, userIDs []string
 	return list, nil
 }
 
+func (r *ListRepo) DeleteList(ctx context.Context, listID string) error {
+	_, err := r.db.ExecContext(ctx, "DELETE FROM lists WHERE id = $1", listID)
+	if err != nil {
+		return fmt.Errorf("failed to delete list: %w", err)
+	}
+
+	return nil
+}
+
 func (r *ListRepo) GetLists(ctx context.Context, userID string) ([]domain.List, error) {
 	rows, err := r.db.QueryContext(ctx,
 		"SELECT l.id, l.name, l.created_at, l.modified_at, (SELECT COUNT(*) FROM list_items WHERE list_id=l.id), (SELECT COUNT(*) FROM list_items WHERE list_id=l.id AND is_completed=true) FROM lists AS l INNER JOIN list_users ON lists.id=list_users.list_id WHERE list_users.user_id = $1",
@@ -153,6 +162,15 @@ func (r *ListRepo) CreateListItem(ctx context.Context, listID string, title stri
 	return l, nil
 }
 
+func (r *ListRepo) DeleteListItem(ctx context.Context, listItemID string) error {
+	_, err := r.db.ExecContext(ctx, "DELETE FROM list_items WHERE id = $1", listItemID)
+	if err != nil {
+		return fmt.Errorf("failed to delete list item: %w", err)
+	}
+
+	return nil
+}
+
 func (r *ListRepo) UpdateListItem(ctx context.Context, listItemID string, title string, isCompleted bool) error {
 	_, err := r.db.ExecContext(ctx, "UPDATE list_items SET title = $1, is_completed = $2, modified_at = NOW() WHERE id = $3",
 		title, isCompleted, listItemID,