Add the Czech language (#281)

* feat: add cs lang

* fix: format

* chore: add member

* refactor: new config

Author: pchalupa

langs/langs.json

@@ -2,6 +2,7 @@
   { "code": "ar", "name": "العربية", "enName": "Arabic" },
   { "code": "az", "name": "Azərbaycanca", "enName": "Azerbaijani" },
   { "code": "bn", "name": "বাংলা", "enName": "Bengali" },
+  { "code": "cs", "name": "Čeština", "enName": "Czech" },
   { "code": "de", "name": "Deutsch", "enName": "German" },
   { "code": "es", "name": "Español", "enName": "Spanish" },
   { "code": "fa", "name": "فارسی", "enName": "Persian" },