Refactor envelope creation SQL logic

Removed `CreateEnvelopeSQL` and introduced `EnvelopeCreateReadSQL` to handle envelope creation logic. Updated the `Extension` class methods and modified `CreateEnvelopeAsync` in `EnvelopeExecutor` to utilize the new SQL class.

EnvelopeGenerator.Application/SQL/EnvelopeCreateReadSQL.cs

@@ -0,0 +1,83 @@
+using Dapper;
+using EnvelopeGenerator.Application.Contracts.SQLExecutor;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.Application.SQL;
+
+/// <summary>
+/// 
+/// </summary>
+public class EnvelopeCreateReadSQL : ISQL<Envelope>
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public string Raw => @"
+        USE [DD_ECM];
+        DECLARE @OUT_UID varchar(36);
+
+        EXEC [dbo].[PRSIG_API_CREATE_ENVELOPE]
+            @USER_ID = @UserId,
+            @TITLE = @Title,
+            @TFAEnabled = @TfaEnabled,
+            @MESSAGE = @Message,
+            @OUT_UID = @OUT_UID OUTPUT;
+
+        SELECT TOP(1) *
+        FROM [dbo].[TBSIG_ENVELOPE]
+        WHERE [ENVELOPE_UUID] = @OUT_UID;
+    ";
+}
+
+/// <summary>
+/// 
+/// </summary>
+public static class Extension
+{
+    private static DynamicParameters CreateParmas(int userId, string title = "", string message = "", bool tfaEnabled = false)
+    {
+        var parameters = new DynamicParameters();
+        parameters.Add("@UserId", userId);
+        parameters.Add("@Title", title);
+        parameters.Add("@TfaEnabled", tfaEnabled ? 1 : 0);
+        parameters.Add("@Message", message);
+        return parameters;
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <typeparam name="TEntity"></typeparam>
+    /// <param name="executor"></param>
+    /// <param name="userId"></param>
+    /// <param name="title"></param>
+    /// <param name="message"></param>
+    /// <param name="tfaEnabled"></param>
+    /// <param name="cancellation"></param>
+    /// <returns></returns>
+    public static async Task<TEntity?> CreateEnvelopeAsync<TEntity>(this ISQLExecutor executor, int userId, string title = "", string message = "", bool tfaEnabled = false, CancellationToken cancellation = default)
+        where TEntity : class
+    {
+        var parameters = CreateParmas(userId, title, message, tfaEnabled);
+
+        var envelopes = await executor.Execute<TEntity, EnvelopeCreateReadSQL>(parameters, cancellation);
+        return envelopes.FirstOrDefault();
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="executor"></param>
+    /// <param name="userId"></param>
+    /// <param name="title"></param>
+    /// <param name="message"></param>
+    /// <param name="tfaEnabled"></param>
+    /// <param name="cancellation"></param>
+    /// <returns></returns>
+    public static async Task<Envelope?> CreateEnvelopeAsync(this IEnvelopeExecutor executor, int userId, string title = "", string message = "", bool tfaEnabled = false, CancellationToken cancellation = default)
+    {
+        var parameters = CreateParmas(userId, title, message, tfaEnabled);
+
+        return await executor.CreateEnvelopeAsync(parameters, cancellation: cancellation);
+    }
+}