Port the DivinerJavelinAtomizer from Javelin
Summary:
Bring back documentation for Javelin by porting the DivinerJavelinAtomizer class to Phorge.
It has been rewritten to support modern Diviner, and to use Peast, rather than jsast.
This allows it to support modern JavaScript syntax without relying on strange binaries
distributed from ponds in some farcical aquatic ceremony.
Ref T15123
Test Plan:
* Run `./bin/diviner generate --book webroot/rsrc/externals/javelin/docs/javelin.book`
* Look at http://phorge.localhost/book/javelin/ and see class documentation under "Free Radicals"
Reviewers: O1 Blessed Committers, avivey
Reviewed By: O1 Blessed Committers, avivey
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T15123
Differential Revision: https://we.phorge.it/D26787