Alphanumeric Callsign For Flights (#1124)

* Alphanumeric Callsign For Flights

PR adds ability to define alphanumeric callsigns to flights, display them and use them during SimBrief OFP generation (if pilot ident as callsign option is not enabled)

Translations for en/es/it/pt-br added.

* Change db table name

* Change db column name, fix rules

* Change db column name

* Another db column name change

* Just another one more

* Last one from anumeric_callsign to callsign

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

app/Models/Flight.php

@@ -15,6 +15,7 @@ use Illuminate\Support\Collection;
  * @property Airline    airline
  * @property int        airline_id
  * @property mixed      flight_number
+ * @property mixed      callsign
  * @property mixed      route_code
  * @property int        route_leg
  * @property bool       has_bid
@@ -60,6 +61,7 @@ class Flight extends Model
         'id',
         'airline_id',
         'flight_number',
+        'callsign',
         'route_code',
         'route_leg',
         'dpt_airport_id',
@@ -104,6 +106,7 @@ class Flight extends Model
     public static $rules = [
         'airline_id'           => 'required|exists:airlines,id',
         'flight_number'        => 'required',
+        'callsign'             => 'string|max:4|nullable',
         'route_code'           => 'nullable',
         'route_leg'            => 'nullable',
         'dpt_airport_id'       => 'required|exists:airports,id',