Add Tai Nüa (tdd)

Requested for translatewiki at
https://translatewiki.net/wiki/Thread:Support/Tai_N%C3%BCa_Translation_Request

Autonym according to Ethnologue.

data/language-data.json

@@ -3976,6 +3976,13 @@
             ],
             "ತುಳು"
         ],
+        "tdd": [
+            "Tale",
+            [
+                "AS"
+            ],
+            "ᥖᥭᥰᥖᥬᥳᥑᥨᥒᥰ"
+        ],
         "te": [
             "Telu",
             [
@@ -4667,7 +4674,8 @@
             "Laoo",
             "Lana",
             "Mymr",
-            "Thai"
+            "Thai",
+            "Tale"
         ],
         "Mongolian": [
             "Mong"
@@ -5015,6 +5023,7 @@
             "kk-arab",
             "kk-cyrl",
             "ky",
+            "tdd",
             "en",
             "ru",
             "vi",