Move the database logic to appointment_management

src/database.php

@@ -187,7 +187,7 @@ function fetchRegions($pdo)
     return $data;
 }
 
-function listHolidays($pdo)
+function fetchHolidays($pdo)
 {
     $query = "SELECT * FROM festivo";
     $result = $pdo->prepare($query);