This change modifies the voice parameter in OpenAI Audio Speech API from using the
Voice enum directly to using the string value of the enum. This provides more
flexibility for handling voice options, especially for custom voices or when voice
names come from configuration.
- Change voice parameter type from Voice enum to String
- Add overloaded methods to accept both enum and string values
- Update tests and documentation to reflect these changes
Signed-off-by: jonghoon park <dev@jonghoonpark.com>
14e7033a8e