GoldenEye: Source 4K invisible text fix

This is a fix for text not appearing in GoldenEye: Source at 4K or higher resolutions. This works by changing the size thresholds for the largest font size to a much higher value, supporting even 8K displays.

Two versions are available:

• SourceScheme.res: Uses the default font sizes.
• SourceScheme_LargeText.res: Uses doubled font sizes for most UI elements. This makes text more readable on hiDPI displays, at the cost of spacing between text elements sometimes being quite low in some menus. Console and chat appearance are fine though.

Installation:

• Make sure the game is not currently running.
• Open the resource folder of the GoldenEye: Source installation folder, which is in Steam's steamapps/sourcemods/gesource folder.
• Replace SourceScheme.res with the downloaded file. Alternatively, download SourceScheme_LargeText.res, rename it to SourceScheme.res and replace the existing file in the installation folder.
• Start the game.