完善错误信息提示，增加两点定距等分、点集转直线端点集合等方法和引用类型以及枚举 · Pull Request !72 · InspireFunction/IFoxCAD

### 相关的Issue

### 原因（目的、解决的问题等）

### 描述（做了什么，变更了什么）
完善错误信息提示，增加两点定距等分、点集转直线端点集合等方法和引用类型以及枚举

### 测试用例（新增、改动、可能影响的功能）

```
[CommandMethod(nameof(DivNum))]
public void DivNum() => CurveTools.Tools_NumberDivide(true);

[CommandMethod(nameof(DivDis))]
public void DivDis() => CurveTools.Tools_DistanceDivide(true);

/// <summary>
/// 指定两点定数等分(含绘制线段)
/// </summary>
/// <param name="isDrawLine">是否绘制线段</param>
public static DivideInfo Tools_NumberDivide(bool isDrawLine = false)
{
    try
    {
        using var dloc = Env.Document.LockDocument();
        var sppr = Env.Editor.GetPoint("\n拾取【定数等分】起始点");
        if (sppr.Status != PromptStatus.OK) return null;
        var spt = sppr.Value;
        var ppo = new PromptPointOptions("\n拾取【定数等分】结束点")
        {
            AllowNone = true,
            UseBasePoint = true,
            BasePoint = spt
        };
        var eppr = Env.Editor.GetPoint(ppo);
        if (eppr.Status != PromptStatus.OK) return null;
        var ept = eppr.Value;
        var pio = new PromptIntegerOptions("\n指定【定数等分】的数量") { AllowNone = true };
        var pir = Env.Editor.GetInteger(pio);
        if (pir.Status != PromptStatus.OK) return null;
        var num = pir.Value;
        var divResult = spt.GetNumberDivideTo(ept, num, true);
        if (isDrawLine) divResult.Points.DrawLines(true, isDifferentColor: true);
        return divResult;
    }
    catch (AcException acex) { acex.AcErrorInfo(); }
    catch (Exception) { throw; }
    return null;
}

/// <summary>
/// 指定两点定距等分(含绘制线段)
/// </summary>
/// <param name="isDrawLine">是否绘制线段</param>
public static DivideInfo Tools_DistanceDivide(bool isDrawLine = false)
{
    try
    {
        using var dloc = Env.Document.LockDocument();
        var sppr = Env.Editor.GetPoint("\n拾取【定距等分】起始点");
        if (sppr.Status != PromptStatus.OK) return null;
        var spt = sppr.Value;
        var ppo = new PromptPointOptions("\n拾取【定距等分】结束点")
        {
            AllowNone = true,
            UseBasePoint = true,
            BasePoint = spt
        };
        var eppr = Env.Editor.GetPoint(ppo);
        if (eppr.Status != PromptStatus.OK) return null;
        var ept = eppr.Value;
        var pdo = new PromptDoubleOptions("\n指定【定距等分】的距离") { AllowNone = true };
        var pdr = Env.Editor.GetDouble(pdo);
        if (pdr.Status != PromptStatus.OK) return null;
        var dis = pdr.Value;
        var divResult = spt.GetDistanceDivideTo(ept, dis, true);
        if (isDrawLine) divResult.Points.DrawLines(true, isDifferentColor: true);
        return divResult;
    }
    catch (AcException acex) { acex.AcErrorInfo(); }
    catch (Exception) { throw; }
    return null;
}

/// <summary>
/// 点集合绘制直线
/// </summary>
/// <param name="points">点集合</param>
/// <param name="isEndToEnd">是否是首尾相连，默认为：<see langword="false"/>首尾不相连</param>
/// <param name="isClose">首尾相连时，是否闭合，默认为：<see langword="false"/>不闭合</param>
/// <param name="colorIndex">直线颜色索引值，默认为：256随层</param>
/// <param name="isDifferentColor">直线是否设置不同的颜色，默认为：<see langword="false"/>不设置</param>
public static void DrawLines(this IEnumerable<Point3d> points, bool isEndToEnd = false, bool isClose = false,
                             int colorIndex = 256, bool isDifferentColor = false)
{
    var linePoints = points.GetLine2PointList(isEndToEnd, isClose);
    if (isDifferentColor) colorIndex = 1;
    linePoints.ForEach(l2p =>
    {
        var line = new Line(l2p.StatrPoint, l2p.EndPoint)
        {
            ColorIndex = isDifferentColor ? colorIndex++ : colorIndex
        };
        Env.Database.AddEntityToModelSpace(line);
        if (isDifferentColor && colorIndex > 255) colorIndex = 1;
    });
}

/// <summary>
/// 将图形对象添加到图形文件中
/// </summary>
/// <param name="database">图形数据库</param>
/// <param name="entity">图形对象</param>
/// <returns>图形的ObjectId</returns>
public static ObjectId AddEntityToModelSpace(this Database database, Entity entity)
{
    // 开启事务处理
    using var trans = database.TransactionManager.StartTransaction();
    // 打开块表记录
    var btr = trans.GetObject(database.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
    // 添加图形到块表记录
    var entId = btr.AppendEntity(entity);
    // 更新数据信息
    trans.AddNewlyCreatedDBObject(entity, true);
    // 提交事务
    trans.Commit();
    return entId;
}
```

类型	指派人员	状态
审查	vicwjb DYH	进行中 (0/1人)
测试	vicwjb DYH	进行中 (0/1人)

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