docs[patch]: Add wrapping library metadata to MongoDB docs example #4957
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This PR adds logic similar to the implementation in Python added in langchain-ai/langchain#13084.
In JS, users instantiate
MongoClient
s and provide them to langchain instead of langchain instantiating theMongoClient
for them. As such, there's no way for langchain to add client metadata like the Python implementation does. Additionally, there's no equivalent ofimportlib.metadata
in Javascript that can return the version of a package. So we'd like to just add this to the documentation example, so that when users use the code provided in the docs, they include the metadata as well.