Adds editorConfig.
Adds editorConfig.

Fixes #5491

grzlus/solidus,scottcrawford03/solidus,forkata/solidus,Senjai/solidus,net2b/spree,jordan-brough/solidus,bonobos/solidus,devilcoders/solidus,Senjai/solidus,pervino/solidus,athal7/solidus,forkata/solidus,athal7/solidus,xuewenfei/solidus,devilcoders/solidus,pervino/solidus,richardnuno/solidus,bonobos/solidus,Arpsara/solidus,athal7/solidus,jsurdilla/solidus,scottcrawford03/solidus,richardnuno/solidus,jordan-brough/solidus,lsirivong/solidus,xuewenfei/solidus,jsurdilla/solidus,devilcoders/solidus,bonobos/solidus,grzlus/solidus,ckk-scratch/solidus,Arpsara/solidus,forkata/solidus,jordan-brough/solidus,grzlus/solidus,lsirivong/solidus,richardnuno/solidus,grzlus/solidus,athal7/solidus,net2b/spree,scottcrawford03/solidus,richardnuno/solidus,Arpsara/solidus,ckk-scratch/solidus,pervino/solidus,ckk-scratch/solidus,scottcrawford03/solidus,jordan-brough/solidus,pervino/solidus,net2b/spree,Arpsara/solidus,xuewenfei/solidus,ckk-scratch/solidus,Senjai/solidus,net2b/spree,Senjai/solidus,xuewenfei/solidus,devilcoders/solidus,lsirivong/solidus,jsurdilla/solidus,forkata/solidus,jsurdilla/solidus,bonobos/solidus,lsirivong/solidus