* feat: add support for voyage-3-large and voyage-code-3 embedding models

- Add voyage-3-large and voyage-code-3 to VoyageAiOptions dropdown
- Update getMaxEmbeddingLength to support 32k context for new models
- Update .env.example with new model options

* unset env example

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Co-authored-by: timothycarambat <rambat1010@gmail.com>