Refactor authentication system to use MongoDB

- Removed Entity Framework Core identity schema and related migrations.
- Introduced MongoDB-based authentication service with user seeding functionality.
- Updated Program.cs to configure authentication and authorization using cookies.
- Created new Login.razor component for user login interface.
- Added RedirectToLogin component for handling unauthorized access.
- Updated Dockerfile and docker-compose files for development and production environments.
- Removed SQLite connection strings and related configurations.
- Added MongoDB connection settings in appsettings.json and Docker configurations.
- Implemented IMongoAuthService interface and MongoAuthService class for user management.
- Created MongoAuthUser model for MongoDB user representation.

Services/Auth/IMongoAuthService.cs

@@ -0,0 +1,10 @@
+using System.Threading;
+
+namespace WorkTracker.Services.Auth;
+
+public interface IMongoAuthService
+{
+    Task EnsureSeedUserAsync(CancellationToken cancellationToken);
+
+    Task<MongoAuthUser?> ValidateCredentialsAsync(string email, string password, CancellationToken cancellationToken);
+}