Add Western Pwo (pwo) to language-data (#480)

Phabricator task: https://phabricator.wikimedia.org/T417024

Co-authored-by: ToluAyo <tayodele-ctr@wikimedia.org>
Co-authored-by: SrishAkaTux <ssethi@wikimedia.org>

Author: 3 people

data/langdb.yaml

@@ -654,6 +654,7 @@ languages:
   pt: [Latn, [EU, AM, AS, PA, AF, WW], português]
   pt-br: [Latn, [AM], português do Brasil]
   pwn: [Latn, [AS], pinayuanan]
+  pwo: [Mymr, [AS], ဖျိၩ့ၡိ]
   pzh: [Latn, [AS], Pazeh]
   qu: [Latn, [AM], Runa Simi]
   quc: [Latn, [AM], "K'iche'"]

data/language-data.json

@@ -4199,6 +4199,13 @@
             ],
             "pinayuanan"
         ],
+        "pwo": [
+            "Mymr",
+            [
+                "AS"
+            ],
+            "ဖျိၩ့ၡိ"
+        ],
         "pzh": [
             "Latn",
             [