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.

Components/Shared/RedirectToLogin.razor

@@ -0,0 +1,10 @@
+@inject NavigationManager NavigationManager
+
+@code {
+    protected override void OnInitialized()
+    {
+        var relativeReturnUrl = NavigationManager.ToBaseRelativePath(NavigationManager.Uri);
+        var loginUrl = $"/login?returnUrl={Uri.EscapeDataString("/" + relativeReturnUrl)}";
+        NavigationManager.NavigateTo(loginUrl, forceLoad: true);
+    }
+}