Add stopSequences parameter to AI SDK functions

[rajeshdavidbabu]

Feature Description

Add support for stop-sequence to gracefully exit stream, so that we can get usage information.

Use Case

Currently, if I wanna exit the stream I have to use abort-controller or break to get out of for await of loop.

This would not gracefully finish and we need a finish so that we can get usage information.

Additional context

No response

[flexchar]

I came across this as a deal breaker to migrate to the new AI SDK functions because certain models just won't stop themselves...

[gergomiklos]

Please prioritize this or offer an option to pass native settings to models

[flexchar]

@gergomiklos do you have time to take a stab at this together?