Callback is done using a global window function.
Printing is performed to the console output.
This is still a work in progress and the final display of the image should be included in the Web interface.

The solution makes use of the chrono module to obtain time and the image module to save PNG files.
The Web version is still pending support for printing.

The image data buffer printing is still pending.
Still a lot of TODOs and edge cases to be solved.

APU enabled getter was not being correctly called.

This allows better understanding of the ROMs and their purpose.

There's still no control over the channels themselves, but the basic interleaved buffer support is now coded.
There's also new support for buffer size definition in seconds.

Support for set of video, audio and timer.
Now with support for toggling audio in the SDL version.

Now the BIOS beep works perfectly.

The emulator is now sounding more like a real audio player 🎧.

Made use of queue support for SDL avoiding the callback approach which greatly simplifies the code and increases the APU accuracy.

It's stil glitchy and noisy, need to check the problems.

Still requires work to be able to be able to emulate APU together with the CPU instead of inverting the control.

This a very work in progress situation that requires stability.
The most important part is the fact that it's possible for an external entity (SDL) to call an audio tick and get a volume.

This allows for a much more fluid draw of frames using the `present_vsync()`.

Normalized handling of ticks in SDL according to the Web version implementation.

Created a series of new structures including the `PaletteInfo` one.

We still need to add more palettes from the Web frontend.

To avoid 0x0 characters in ROM title.

This reverts commit e252646f.