Add Nawdm (nmz)

Requested at
https://translatewiki.net/wiki/Thread:Support/Please_add_Nawdm_language

Autonym according to
Dictionnaire nawdm, SIL International
at https://www.webonary.org/nawdm/

data/langdb.yaml

@@ -436,6 +436,7 @@ languages:
   njo: [Latn, [AS], Ao]
   nl-informal: [Latn, [EU, AM], Nederlands (informeel)]
   nl: [Latn, [EU, AM], Nederlands]
+  nmz: [Latn, [AF], nawdm]
   nn: [Latn, [EU], norsk (nynorsk)]
  # There's also nb for Bokmål and nn for Nynorsk
   "no": [Latn, [EU], norsk]

data/language-data.json

@@ -2805,6 +2805,13 @@
             ],
             "Nederlands"
         ],
+        "nmz": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "nawdm"
+        ],
         "nn": [
             "Latn",
             [