Improve scramble-hide and seek notification system

Currently, these two event notifications appear in the center of the screen, which often makes them difficult to read due to terrain and landscape interference. As a result, many players miss the first message entirely, putting them at a disadvantage while waiting for the second one. Additionally, this overlaps with other important event and invasion notifications, which is not ideal.

Please consider adding a configuration option that allows us to choose the display method for event notifications:

- On the main screen (as it is now)
- As a global post message, with the ability to select a custom text color for improved visibility

Additionally, we request an option to disable the scramble difficulty level message, since it's unnecessary when using only one difficulty setting. Currently, removing the text from the language file prevents the gameserver from starting, which is problematic. A config like ShowDifficultyMessage="1/0" would be awesome.

Finally, we need the ability to remove the "Guess the mixed word" section in the Scramble event and keep only the hint/question line, making the event cleaner and more flexible. A config like ShowScrambleTypeMessage="1/0" would be awesome.