added artificially generated content flag

[loarie]

add flaggedAsArtificial for use here inaturalist/inaturalist#4680

[pleary]

To get this branch of inaturalistjs working in the inaturalistcode, you need to update package.json in the inaturalist codebase to reference the commit hash of the version you want to use. Then run npm update inaturalistjs there. e.g. "inaturalistjs": "github:inaturalist/inaturalistjs#7e3c2e7257f817b21313d2e0ada234ec3903d6c9",. We won't want to merge into main like that, so before merging the branch of the inaturalist codebase into main, we'll first want to merge this inaturalistjs change into the main branch here, then remove the hash from the package.json in the inaturalist codebase, and again run npm update inaturalistjs so that codebase references the new main of inaturalistjs with these changes

[pleary]

Ignore my first review - I meant to add that to this PR