Add Bulgarian translation
Add Bulgarian translation

Why:

* The BG locale translation was missing

This change addresses the need by:

* Adding translation yml for bg locale

myplaceonline/ckeditor,Eepa/ckeditor,glebtv/ckeditor,myplaceonline/ckeditor,209cameronism/ckeditor-npp,Eepa/ckeditor,lenamuit/ckeditor,galetahub/ckeditor,glebtv/ckeditor,moneyadviceservice/ckeditor,gambala/ckeditor,glebtv/ckeditor,myplaceonline/ckeditor,209cameronism/ckeditor-npp,lenamuit/ckeditor,gambala/ckeditor,Eepa/ckeditor,galetahub/ckeditor,lenamuit/ckeditor,galetahub/ckeditor,gambala/ckeditor,209cameronism/ckeditor-npp,moneyadviceservice/ckeditor