Compiler progress countdown feature

[richardFK]

QB64 dev d98b220 Win 10 x64 Pro build 21H1 (Aug updated)

A down counter to indicate compiling progress would be helpful.

Although there was no need at this stage for $DEBUG, I tried out an extremely large program with a valid breakpoint setting.

On compiling get the expected "Creating .EXE file..." message, however after waiting over an hour the compilation was not completed. Windows Task Manager shows Cc1plus at memory 595 Mbyte and still rising at about 1 Mbyte per minute.

[flukiluke]

Once you see the Creating .EXE file message, QB64 has called out to gcc. Since gcc does not provide progress information, QB64 cannot give any further feedback.