[do not merge] add reproducable code example

[KazuCocoa]

(appium-python-client) kazu $ pyright script/pylance_repro.py
/Users/kazu/github/python-client/script/pylance_repro.py
  /Users/kazu/github/python-client/script/pylance_repro.py:10:28 - error: Cannot instantiate abstract class "WebDriver"
    "CanExecuteScripts.pin_script" is not implemented
    "CanExecuteScripts.unpin" is not implemented
    and 4 more... (reportAbstractUsage)
1 error, 0 warnings, 0 informations

With this PR to tell pyright refer to the venv properly:

(appium-python-client) kazu $ pyright script/pylance_repro.py         
0 errors, 0 warnings, 0 informations