feature request: openrouter option for the Speech To Text

Clear and concise description of the problem

i was so confused when i realize the AIRI have limited speech to text provider option

Suggested solution / Ideas

it would be really nice if u guys can add openrouter and nvidia nim thankyou for this project have a nice day

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.