Improving C# documentation for Internationalizing games #12477

Your Godot version:
4.7.2

Issue description:
The C# documentation on implementing translation behavior is incomplete in some places and incorrect in others:

• Automatically setting a language is missing a C# example
• the code example given for Converting keys to text does not produce the expected result because string interpolation is evaluated before Object.Tr(). I suggest changing the snippet to status.Text = string.format(Tr("GAME_STATUS_{0}"), statusIndex); as this will produce the desire behavior and brings it in line with later examples. This was a misinterpretation of the code on my part. This code example has been clarified with comments.
• the Placeholders section is missing a C# example and the guidance provided in the explanation is vague. I suggest swapping "equivalent feature" for "string.Format()".

URL to the documentation page (if already existing):
https://docs.godotengine.org/en/stable/tutorials/i18n/internationalizing_games.html