Add Levantive Arabic (ajp) (#166)

Requested at https://phabricator.wikimedia.org/T286290 .

Co-authored-by: Antoine Dusséaux <a455bcd9@users.noreply.github.com>

data/langdb.yaml

@@ -13,6 +13,9 @@ languages:
   aeb-latn: [Latn, [AF], Tûnsî]
   af: [Latn, [AF], Afrikaans]
   ahr: [Deva, [AS], अहिराणी]
+  ajp: [Arab, [ME], شامي]
+  ajp-arab: [ajp]
+  ajp-latn: [Latn, [ME], šāmi]
   ak: [Latn, [AF], Akan]
   akz: [Latn, [AM], Albaamo innaaɬiilka]
   aln: [Latn, [EU], Gegë]