Add Torwali (trw)

Downstream task:
https://phabricator.wikimedia.org/T369578

data/langdb.yaml

@@ -753,6 +753,7 @@ languages:
   trp: [Latn, [AS], Kokborok]
   tru: [Latn, [AS], Ṫuroyo]
   trv: [Latn, [AS], Seediq]
+  trw: [Arab, [AS], توروالی]
   ts: [Latn, [AF], Xitsonga]
   tsd: [Grek, [EU], Τσακωνικά]
   tsg: [Latn, [AS], Sinūg]

data/language-data.json

@@ -4765,6 +4765,13 @@
             ],
             "Seediq"
         ],
+        "trw": [
+            "Arab",
+            [
+                "AS"
+            ],
+            "توروالی"
+        ],
         "ts": [
             "Latn",
             [
@@ -6651,7 +6658,8 @@
             "tg-cyrl",
             "bft",
             "khw",
-            "ks-arab"
+            "ks-arab",
+            "trw"
         ],
         "PL": [
             "pl",