Python: Bug: fail to add plugin from file with "utf-8" encoding (UnicodeDecodeError: 'charmap' codec)

[BinarywoodB]

Describe the bug
When I add plugin to kernel via kelnel.add_plugin(), the loading of prompt files from skprompt.txt file will fail with UnicodeDecodeError error

To Reproduce
Steps to reproduce the behavior:

1. in plugins/attachment/asr_test_analysis/ folder, I have 2 files. One is the prompt file skprompt.txt, the other is the config.json file indicating the function configuration like input variables, etc.
2. In my program, add this attachment plugin via:

        prompt_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "plugins")
        kernel.add_plugin(
            parent_directory=prompt_dir,
            plugin_name="attachment",
        )

3. See error:

----
 File "C:\Users\dilin\Documents\workspace\SPEECH\car_agent\speech_car\agent_for_car\venv\Lib\site-packages\semantic_kernel\functions\kernel_function_from_prompt.py", line 395, in from_directory
    prompt_template_config.template = prompt_file.read()
                                      ^^^^^^^^^^^^^^^^^^
  File "C:\Users\dilin\AppData\Local\anaconda3\Lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 1938: character maps to <undefined>

4. We use a workaround to set PYTHONUTF8 to bypass this issue. But we are hoping that the issue can be resolved from the semantic kernel side.

Expected behavior
When semantic kernel loads the prompt file, it should open it with encoding setting utf-8.

Platform

• Language: Python
• Source: pip package version 1.29.0
• AI model: gpt-4o
• IDE: VS Code
• OS: Windows