add translation + evaluation

[jlonge4]

Issue #, if available: N/A Description of changes: Added new notebook demonstrating text translation with Amazon Bedrock and quantitative evaluation using industry-standard metrics (BLEU, BERTScore, METEOR, ChrF). Includes translation functions, WMT14 dataset integration, and visualization tools for comparing model performance on real-world translation tasks.

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[jlonge4]

@claumazz