Add indonesian translations

docs/i18n.md

@@ -53,6 +53,7 @@ Some of the languages Solaar has been translated to are listed below. A full lis
 - Russian: [Dimitriy Ryazantcev][DJm00n]
 - Slovak: [Jose Riha][jose1711]
 - Svensk: [Daniel Zippert][zipperten], Emelie Snecker
+- Indonesia: [Ferdina Kusumah][feku]
 
 [Rongronggg9]: https://github.com/Rongronggg9
 [papoteur]: https://github.com/papoteur
@@ -66,3 +67,4 @@ Some of the languages Solaar has been translated to are listed below. A full lis
 [drovetto]: https://github.com/drovetto
 [jrbenito]: https://github.com/jrbenito
 [jeblad]: https://github.com/jeblad
+[feku]: https://github.com/FerdinaKusumah

lib/solaar/ui/about.py

@@ -79,6 +79,7 @@ def _create():
                 "Daniel Zippert, Emelie Snecker (svensk)",
                 "Dimitriy Ryazantcev (Russian)",
                 "El Jinete Sin Cabeza (Español)",
+                "Ferdina Kusumah (Indonesia)",
             )
         )
     )