Add IBM Watson transcription provider

[EnesBrt]

Withdrawn

Withdrawn at contributor request.

The companion Daytona content PR has also been withdrawn; no bounty claim is being made from this PR.

[EnesBrt]

Quick follow-up on the red checks: the failing Continuous AI statuses show Agent encountered an error, not a repository test failure. I re-ran the focused validation locally after the signed-off commit:

• PYTHONPATH=src python -m unittest tests.test_ibm_watson -> 2 passed
• python -m compileall src tests -> passed
• git diff --check -> passed

Happy to address any maintainer feedback on the provider shape.

[EnesBrt]

Added CLI coverage in the same branch so the provider is tested from the command entry point too. Current local validation after the update:

• PYTHONPATH=src python -m unittest discover -s tests -v -> 4 passed
• python -m compileall src tests -> passed
• git diff --check -> passed

The new tests/test_script.py checks that --api ibm appears in help output and that selecting it instantiates IBMWatsonTranscription and forwards the expected file/options to process_file.

[EnesBrt]

Withdrawn at contributor request. Closing this PR and deleting the source branch.