Scripting: Implemented System.RuntimeInfo

Implemented a read-only System.RuntimeInfo String property that returns
the information formerly displayed when pressing Ctrl+V in a game.
Placed the old Ctrl+V shortcut behind a game file version check to
ensure that Ctrl+V isn't intercepted by default for newer games. The
debug implementation of `debug(1, 0)` still works in debug mode.
Internally, it just calls System_GetRuntimeInfo and displays the info.
The System.RuntimeInfo property exists in debug or release mode. The
user may implement the display of this info however s/he likes.