Added local language detection

Added language.cfg for all locale folders from the base game
Added language.lua with the functions which detect the local language
Added language.lua to _file_loader.lua

modules/data/language.lua

@@ -0,0 +1,33 @@
+--- Stores the language used to join the server
+-- @data Language
+
+local Event = require 'utils.event' ---@dep utils.event
+local PlayerData = require 'expcore.player_data' --- @dep expcore.player_data
+local LocalLanguage = PlayerData.Settings:combine('LocalLanguage')
+LocalLanguage:set_default("Unknown")
+
+--- Creates translation request on_load of a player
+LocalLanguage:on_load(function(player_name, language)
+  local player = game.players[player_name]
+  player.request_translation("language.local-language")
+end)
+
+--- Resolves translation request for language setting
+Event.add(defines.events.on_string_translated, function(event)
+  -- Check if the translation request was for language setting
+  if event.localised_string ~= "language.local-language" then 
+    return 
+  end
+
+  -- Check if the translation request was succesful
+  if not event.translated then
+    game.print("Could not detect your language settings")
+    -- Raise error
+    return
+  end
+
+  -- Change LocalLanguage value for the player to the recognized one
+  local player = game.players[event.player_index]
+  local language = {event.result}
+  LocalLanguage:set(player, language)
+end)