Add "Notes" to Airports (#1467)

* Notes for Airports

Adds capability of having notes/remarks for airports, includes

* New database field
* Airport Model change
* CSV Import/Export capability for notes
* Admin Airports list page change
* Admin Airports edit page change
* Default Template Airport show page change

* Update Airport Tests

* Add the new field to source csv
* Check if the import works

* Update AirportFactory.php

Co-authored-by: Nabeel S <nabeelio@users.noreply.github.com>

app/Models/Airport.php

@@ -19,6 +19,7 @@ use Illuminate\Database\Eloquent\Factories\HasFactory;
  * @property string location
  * @property string country
  * @property string timezone
+ * @property string notes
  * @property float  ground_handling_cost
  * @property float  fuel_100ll_cost
  * @property float  fuel_jeta_cost
@@ -56,6 +57,7 @@ class Airport extends Model
         'fuel_100ll_cost',
         'fuel_jeta_cost',
         'fuel_mogas_cost',
+        'notes',
     ];
 
     protected $casts = [
@@ -81,8 +83,7 @@ class Airport extends Model
         'ground_handling_cost' => 'nullable|numeric',
         'fuel_100ll_cost'      => 'nullable|numeric',
         'fuel_jeta_cost'       => 'nullable|numeric',
-
-        'fuel_mogas_cost' => 'nullable|numeric',
+        'fuel_mogas_cost'      => 'nullable|numeric',
     ];
 
     /**