[discovery] New Glossary of Search Terms

Hi everyone,

I've created a first draft of a small glossary of terms we use in search, including internal-only vocab (PaulScore, Discernatron, RelForge, etc.) and some general vocab (recall, precision, F1, DCG, etc).

The glossary lives on mediawiki.org: https://www.mediawiki.org/wiki/Wikimedia_Discovery/Search/Glossary

This isn't an overly formal glossary, so some of my opinions may have made it into the definitions.

Feel free to edit, expand, editorialize, or even suggest new items to be defined.

Thanks, —Trey

Trey Jones Software Engineer, Discovery Wikimedia Foundation