Refactor message service and move tests to Application.Tests

Renamed IMessageService to IMessageCommandService and updated all usages accordingly. Moved and renamed test files from Govor.API.Tests to the new Govor.Application.Tests project, updating namespaces to match. Refactored message-related services and controllers to use the new naming and structure. Added Govor.Application.Tests project to the solution.

Govor.Application/Services/Authentication/JwtService.cs

@@ -0,0 +1,40 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using Govor.API.Services.Authentication.Interfaces;
+using Govor.Core.Models;
+using Microsoft.Extensions.Options;
+using Microsoft.IdentityModel.Tokens;
+
+namespace Govor.Application.Services.Authentication;
+
+public class JwtService : IJwtService
+{
+    private JwtOption _jwtOption;
+    private IInvitesService _invitesService;
+    
+    public JwtService(IOptions<JwtOption> options, IInvitesService invitesService)
+    {
+        _jwtOption = options.Value;
+        _invitesService = invitesService;
+    }
+    
+    public async Task<string> GenerateJwtTokenAsync(User user)
+    {
+        var claims = new[]
+        {
+            new Claim("userId", user.Id.ToString()),
+            new Claim(ClaimTypes.Role, await _invitesService.GetRoleAsync(user), ClaimValueTypes.String)
+        };
+        
+        var singing = new SigningCredentials(
+            new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_jwtOption.SecretKeу)),
+            SecurityAlgorithms.HmacSha256Signature);
+
+        var token = new JwtSecurityToken(signingCredentials: singing,
+            expires: DateTime.UtcNow.AddHours(_jwtOption.Hours),
+            claims: claims);
+        
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+}