Consistent UTF-8 where possible (#9927)

* Consistent UTF-8 where possible

* Remove one import

desktop/src/com/unciv/app/desktop/DesktopLauncher.kt

@@ -65,7 +65,7 @@ internal object DesktopLauncher {
                 width = maximumWindowBounds.width,
                 height = maximumWindowBounds.height
             )
-            FileHandle(SETTINGS_FILE_NAME).writeString(json().toJson(settings), false) // so when we later open the game we get fullscreen
+            FileHandle(SETTINGS_FILE_NAME).writeString(json().toJson(settings), false, Charsets.UTF_8.name()) // so when we later open the game we get fullscreen
         }
         // Kludge! This is a workaround - the matching call in DesktopDisplay doesn't "take" quite permanently,
         // the window might revert to the "config" values when the user moves the window - worse if they

desktop/src/com/unciv/app/desktop/ImagePacker.kt

@@ -121,7 +121,7 @@ internal object ImagePacker {
         // An image folder can optionally have a TexturePacker settings file
         val settingsFile = File("$input${File.separator}TexturePacker.settings")
         val settings = if (settingsFile.exists())
-            Json().fromJson(TexturePacker.Settings::class.java, settingsFile.reader())
+            Json().fromJson(TexturePacker.Settings::class.java, settingsFile.reader(Charsets.UTF_8))
         else defaultSettings
 
         TexturePacker.process(settings, input, output, packFileName)

desktop/src/com/unciv/app/desktop/SystemUtils.kt

@@ -39,6 +39,9 @@ object SystemUtils {
             builder.appendLine("Max Memory: $maxMemory MB")
         }
 
+        // Encoding used by Java when not explicitly specified/-able (such as atlas loader)
+        builder.appendLine("System default encoding: " + Charset.defaultCharset().name())
+
         return builder.toString()
     }