(EAI-177): Implement FAQ Finder

[cbush]

Jira: https://jira.mongodb.org/browse/EAI-177

Changes

• Adds FAQ finding to the scripts package
• Using DBSCAN algorithm to cluster similar questions
• Script takes optional epsilon argument (otherwise defaults to 0.05). Epsilon is the max distance to form a cluster.
• Stores FAQ entries in a 'faq' collection in the database for further processing. Each question and response is stored even though many are similar.

Example FAQ entry document:

Notes

The intention is to run this on cron maybe daily or every five days. Because each run stores the timestamp, we'll be able to look at trends in FAQ over time.

For verified answers, the next step is to script a transfer from the faq collection to a yaml document that can be filled out by a human, per the spec.

[mongodben]

i notice CI not running on this PR. do you know why that might be?

[cbush]

I haven't pushed upstreammmm