Importing RustPython via Git leads to failure in importing local modules.

When I import the latest version of RustPython dependencies using Git, I encounter issues with failing to import local modules. However, if I use version 0.4.0 from crates.io, the imports work successfully.

rustpython = { git = "https://github.com/RustPython/RustPython", branch = "main", features = ["stdlib", "freeze-stdlib","threading","ssl-vendor" ] }
rustpython-vm = { git = "https://github.com/RustPython/RustPython", branch = "main" }

python code:

    script_dir = os.path.dirname(__file__)
    print(f"Script directory: {script_dir}")
    print("Python directory contents:")
    for item in os.listdir(script_dir):
       item_path = os.path.join(script_dir, item)
       if os.path.isdir(item_path):
             print(f"  [DIR]  {item}")
    test_dir = os.path.join(script_dir, 'test')
    if os.path.exists(test_dir):
      print(f"\nTest directory contents:")
      for item in os.listdir(test_dir):
        print(f"  {item}")
    else:
        print(f"\nTest directory does not exist at: {test_dir}")

    try:
          from test.test_base import TestBase
          print("Import successful！")
    except ImportError as e:
          print(f"Import failed: {e}")

Print log：
[python/main.py:379 in main()] Script directory: /var/mobile/Containers/Data/Application/4FC1AFD7-F437-48CB-B439-B165177E3CEB/Documents/home/debug/main/python
[python/main.py:380 in main()] Python directory contents:
[python/main.py:384 in main()] [DIR] test
[python/main.py:387 in main()] Test directory contents:
[python/main.py:389 in main()] test_base.py
[python/main.py:397 in main()] Import failed: No module named 'test.test_base'

Start by reproducing the reported import with RustPython from the main Git branch and compare it with the working 0.4.0 crates.io version, using the provided Python snippet and dependency declarations. Trace the local-module import path around the failure; the issue is done when importing test.test_base works with the Git dependencies without breaking the existing behavior.