Add the Tyap language (kcg)

Requested at
https://translatewiki.net/wiki/Thread:Category_talk:User_languages/New_Language_Addition

Autonym spelling according to
https://www.sil.org/resources/archives/53626

data/langdb.yaml

@@ -286,6 +286,7 @@ languages:
   kbd-latn: [Latn, [EU], Qabardjajəbza]
   kbd: [Cyrl, [EU, ME], Адыгэбзэ]
   kbp: [Latn, [AF], Kabɩyɛ]
+  kcg: [Latn, [AF], Tyap]
   kea: [Latn, [AF], Kabuverdianu]
   kg: [Latn, [AF], Kongo]
   kgp: [Latn, [AM], Kaingáng]

data/language-data.json

@@ -1811,6 +1811,13 @@
             ],
             "Kabɩyɛ"
         ],
+        "kcg": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "Tyap"
+        ],
         "kea": [
             "Latn",
             [
@@ -5392,6 +5399,7 @@
             "ig",
             "yo",
             "ha-arab",
+            "kcg",
             "ar",
             "ff"
         ],