#245: add comments filter

[lessej]

trafficstars

Context

Implements https://github.com/tnc-ca-geo/animl-frontend/issues/245

Add comments filter so users can filter images by the content of comments on the image. Implemented using the $search $text operator in MongoDB. https://www.mongodb.com/docs/manual/reference/operator/query/text/#mongodb-query-op.-text

Related PRs

animl-api

[lessej]

@nathanielrindlaub the comment filter should be working to search by phrase and all the PR checks are passing now. Please feel free to review unless you would like some other features to enhance the comments filter. Thanks!