feat: implement missions and vehicles management with CRUD operations

Added new project structure for Azaion.Missions, including the MissionsController and VehiclesController for handling mission and vehicle management. Implemented DTOs for mission and vehicle creation and updates, along with service classes for business logic. Introduced database entities for Mission and Vehicle, and established relationships for data handling. Configured project dependencies and set up initial project properties.

DTOs/GetMissionsQuery.cs

@@ -0,0 +1,10 @@
+namespace Azaion.Flights.DTOs;
+
+public class GetFlightsQuery
+{
+    public string? Name { get; set; }
+    public DateTime? FromDate { get; set; }
+    public DateTime? ToDate { get; set; }
+    public int Page { get; set; } = 1;
+    public int PageSize { get; set; } = 20;
+}