adds nltk requirement

Author: justin-cechmanek

pyproject.toml

@@ -33,6 +33,7 @@ tenacity = ">=8.2.2"
 tabulate = "^0.9.0"
 ml-dtypes = "^0.4.0"
 python-ulid = "^3.0.0"
+nltk = { version = "^3.8.1", optional = true }
 openai = { version = "^1.13.0", optional = true }
 sentence-transformers = { version = "^3.4.0", optional = true }
 scipy = [