Whisper: Support command line (#746)

* Whisper: Add CLI command

* Whisper: Prevent precision loss when converting to words dictionary

* Whisper: disable json ensure_ascii

* Whisper: add cli setup config

* Whisper: pre-commit

* Whisper: Adjust the _ in the command line arguments to -

* nits

* version + readme

* nit

---------

Co-authored-by: Awni Hannun <awni@apple.com>

whisper/mlx_whisper/timing.py

@@ -276,7 +276,7 @@ def add_word_timestamps(
                         word=timing.word,
                         start=round(time_offset + timing.start, 2),
                         end=round(time_offset + timing.end, 2),
-                        probability=timing.probability,
+                        probability=float(timing.probability),
                     )
                 )