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ARROW-1911: [JS] Add Graphistry to Arrow JS proof points

Realized Graphistry's use wasn't listed, which matters as we're the most enterprise-y user right now.

Also made the GOAI reference more clear.

Author: lmeyerov <lmeyerov@gmail.com>

Closes #1412 from lmeyerov/patch-1 and squashes the following commits:

ff5f7375 [lmeyerov] fix(more precise description)
1fe8dad2 [lmeyerov] docs(fix backlink information architecture)
3a80c4d8 [lmeyerov] docs(tweak js readme)
d78f414c [lmeyerov] docs(normalize and sort implementation order)
4968dc93 [lmeyerov] docs(graphistry and goai in main powered by)
af8c0383 [lmeyerov] docs(include JS impl in main readme.md list)
e70e534d [lmeyerov] docs(add getting involved to develop.md)
a7e8d017 [lmeyerov] docs(add and cleanup orgs)
29629260 [lmeyerov] [JS] Add Graphistry to Arrow JS projects