Does not work with AutoCAD/Civil 3D 2025

### Search existing issues

- [x] I have searched the issue tracker and confirmed that I was unable to find existing issues for the problem I am experiencing.

### The problem

If I try to open the Python console in Civil 3D 2025 by running the `PYTHONCONSOLE` command or by clicking the `Run CPS` button in the ribbon, I get an error window:


Then it brings up the shell window showing this:


If I then try to run some Python code within the window, I get a message and Civil 3D freezes indefinitely:


I assume the CadPythonShell plugin needs upgraded to work with .NET framework 8, which AutoCAD/Civil 3D now uses.

### Release version

1.1.3

### Operating system

Windows 10

### Steps to reproduce the behavior

_No response_

### Log files

_No response_

### Screenshots

_No response_

### Additional context

_No response_

首先使用 PYTHONCONSOLE 命令和功能区上的 Run CPS 按钮在 Civil 3D 2025 中复现该故障，然后检查 issue 中显示的错误窗口和 shell 窗口。完成的标准是 Python 控制台能够打开并运行 Python 代码，而不会使 .NET Framework 8 下的 Civil 3D 卡死。

由索引模型根据 Issue 内容生成。