Refactor services to use repository pattern for database operations

- Updated EmpresaReportService to utilize ICatalogoRepository for stored procedure calls.
- Refactored InformeService to include new method for executing Crystal Reports stored procedures.
- Simplified LeadService by removing direct database connections and using ILeadRepository and ILeadQueryRepository.
- Modified ReportService to leverage ICatalogoRepository for querying stored procedures.
- Streamlined UsuarioService to use IUsuarioRepository for user authentication and profile retrieval.
- Added new CatalogoService to handle various catalog-related queries and operations.
- Introduced ArqueoRepository and CatalogoRepository for managing database interactions.
- Created DTOs for various entities including Alumno, Contrato, Cotizacion, Descuento, Documento, Empresa, and Propuesta.
- Implemented BaseController and ErrorController for standardized API responses and error handling.
- Added QuestPDF package for PDF generation capabilities.

backend/src/Ventas.Infrastructure/Repositories/CatalogoRepository.cs

@@ -0,0 +1,36 @@
+using Dapper;
+using Npgsql;
+using Ventas.Core.Interfaces;
+
+namespace Ventas.Infrastructure.Repositories;
+
+public class CatalogoRepository : ICatalogoRepository
+{
+    private readonly string _connectionString;
+
+    public CatalogoRepository(string connectionString)
+    {
+        _connectionString = connectionString;
+    }
+
+    public async Task<IEnumerable<Dictionary<string, object>>> QuerySpAsync(string sp, object parameters)
+    {
+        using var connection = new NpgsqlConnection(_connectionString);
+        var rows = await connection.QueryAsync(sp, parameters, commandType: System.Data.CommandType.StoredProcedure);
+        return rows.Select(r => (Dictionary<string, object>)(IDictionary<string, object>)r!);
+    }
+
+    public async Task<string> ExecuteSpAsync(string sp, object parameters)
+    {
+        using var connection = new NpgsqlConnection(_connectionString);
+        await connection.ExecuteAsync(sp, parameters, commandType: System.Data.CommandType.StoredProcedure);
+        return "ok";
+    }
+
+    public async Task<string?> QuerySingleSpAsync(string sp, object parameters)
+    {
+        using var connection = new NpgsqlConnection(_connectionString);
+        return await connection.QuerySingleOrDefaultAsync<string>(sp, parameters,
+            commandType: System.Data.CommandType.StoredProcedure);
+    }
+}