Windows Powershell CWD detection problem

<!-- # READ CAREFULLY: * **ENGLISH ONLY** - this issue tracker is English-only. Please respect the people who take time to help you with your problems. * Search existing issues first: https://github.com/Eugeny/tabby/issues * Test with the latest Tabby version: https://github.com/Eugeny/tabby/releases * Disable third-party plugins. --> **Describe the problem**: When retrieving the CWD in PowerShell, the result can be affected by the content of the previously executed command. As a result, the working directory in a new tab may unexpectedly be set to a different location. **To Reproduce**: 1. As an example, run the following dir command. ``` PS C:\Users\Default> dir C:\Users\Default\AppData\ ディレクトリ: C:\Users\Default\AppData Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 2025/06/10 14:52 Local d----- 2025/06/10 14:49 LocalLow d----- 2025/06/10 14:47 Roaming ``` 2. Open a new PowerShell tab using Duplicate or New Terminal. 3. The current directory is affected by the previous command. ``` PS C:\Users\Default\AppData> ```