Add Tsishingini (tsw) language metadata (#503)

Change-Id: I08e20d6d589dbeded2936ccf082ae9f439a6e89d

Co-authored-by: SrishAkaTux <ssethi@wikimedia.org>

Author: gkm563

data/langdb.yaml

@@ -827,6 +827,7 @@ languages:
   tsd: [Grek, [EU], Τσακωνικά]
   tsg: [Latn, [AS], Sinūg]
   tsu: [Latn, [AS], cou]
+  tsw: [Latn, [AF], Tsishingini]
   tt: [Cyrl, [EU], татарча]
   tt-cyrl: [tt]
   tt-latn: [Latn, [EU], tatarça]

data/language-data.json

@@ -5313,6 +5313,13 @@
             ],
             "cou"
         ],
+        "tsw": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "Tsishingini"
+        ],
         "tt": [
             "Cyrl",
             [