Fix Pyright type hints. (#426)

* Fix Pyright type hints.

* Fix types in test_time_stretch.py.

* Fix tensorflow type hints.

* Fix tests/test_stream_resampler.py

* Fix tests/test_resampled_io.py hints.

* Enforce Pyright at CI time.

* Allow type hint compilation on Linux.

* Use uv sync.

* Split type checking into different GitHub Action.

* Whoops.

* Add pyright to test dependencies.

* Add missing test dependencies.

* Only run pyright on package and test code.

* Use Python 3.9-friendly type hint syntax.