Add Hindko (hno)

Requested at
https://translatewiki.net/wiki/Thread:Support/Request_to_enable:_Hindko

Autonym according to Ethnologue.

data/langdb.yaml

@@ -265,6 +265,7 @@ languages:
   hif-latn: [hif]
   hil: [Latn, [AS], Ilonggo]
   hne: [Deva, [AS], छत्तीसगढ़ी]
+  hno: [Arab, [AS], ہندکو]
   ho: [Latn, [PA], Hiri Motu]
   hoc: [Wara, [AS], 𑢹𑣉𑣉]
   hr: [Latn, [EU], hrvatski]

data/language-data.json

@@ -1687,6 +1687,13 @@
             ],
             "छत्तीसगढ़ी"
         ],
+        "hno": [
+            "Arab",
+            [
+                "AS"
+            ],
+            "ہندکو"
+        ],
         "ho": [
             "Latn",
             [
@@ -6078,6 +6085,7 @@
             "ps",
             "sd",
             "skr-arab",
+            "hno",
             "brh",
             "fa",
             "bgn",