Add Manado language (xmm)

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

Autonym according to Ethnologue. (And Indonesian Wikimedians
usually ask not to include "Bahasa" and similar words.)

data/langdb.yaml

@@ -696,6 +696,7 @@ languages:
   xal: [Cyrl, [EU], хальмг]
   xh: [Latn, [AF], isiXhosa]
   xmf: [Geor, [EU], მარგალური]
+  xmm: [Latn, [AS, PA], Manado]
   xsy: [Latn, [AS], SaiSiyat]
   ydd: [yi]
   yi: [Hebr, [ME, EU, AM], ייִדיש]

data/language-data.json

@@ -4578,6 +4578,14 @@
             ],
             "მარგალური"
         ],
+        "xmm": [
+            "Latn",
+            [
+                "AS",
+                "PA"
+            ],
+            "Manado"
+        ],
         "xsy": [
             "Latn",
             [