[Feature Request] Support basedpyright lsp in pack-python.

[chaozwn]

Is your feature related to a problem?

pyright is missing too many features that an lsp should have.We should switch to basedpyright for more functional experience.

Describe the new feature

Change pyright to basedpyright.

Additional context

No response

[Uzaaft]

This is planned but holding off on that until it gets more reliable