Adds this CPU speed print support to the web debug panel.

In some versions of WASM-bindgen the re-setting of the hook from the current panicking thread would fail.

This makes it possible to select CBG or DMG mode taking into consideration the CGB flag in the ROM file.

There's also support for the disable operation.

Including CGB and DMG.

Created more panic conditions for the KEY0 and KEY1.

Done that by making use of the new emukit features.

The new event driven strategy works better with react.

This makes uses of WASM to JS pipeline.

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 components have been moved from emukit.

Also added CH4 public WASM API