[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 <70930885+msyyc@users.noreply.github.com>

* update lock file

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: msyyc