[python] bump typespec-python 0.47.0 (#42069)

* Initial plan

* Bump typespec-version for emitter-package.json and emitter-package-lock.json

Co-authored-by: msyyc <[email protected]>

* update lock file

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>

Author: msyyc