feat: add fireworks model provider

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🦋 Changeset detected

Latest commit: 61159ffdaff62b97e73be16d9a156e74c3890a62

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

| Name | Type | | -------------------- | ----- | | @empiricalrun/ai | Minor | | @empiricalrun/core | Patch | | @empiricalrun/scorer | Patch | | @empiricalrun/cli | Patch |

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[arjunattam]

fyi the example run is failing because we're running an older version of the cli package (directly from npm) - which does not set the GITHUB_OUTPUT variable