Bug 24001 – Add console module to replace std.stdio

Consoles are a special subclass of standard IO. On Windows you want to use the UTF-16 instead of UTF-8/ANSI functions to read and write to it. This circumvents the need for setting code pages which don't always work and have to be reset when the program has been completed. It would also be ideal to have timeout support for reading. It should not throw exceptions if a console has not been attached. Instead, completion with no failure would be more desirable in the cases such as in a GUI program. This bug ticket represents a solution to the following reports: https://issues.dlang.org/show_bug.cgi?id=23312 https://issues.dlang.org/show_bug.cgi?id=6880 https://issues.dlang.org/show_bug.cgi?id=1448 https://issues.dlang.org/show_bug.cgi?id=12990 https://issues.dlang.org/show_bug.cgi?id=15761

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