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

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.

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.

The components have been moved from emukit.

Uses the `build.rs` file to generate compile time information about the build environment.
This information is exposed to the WASM environment through interface methods that are then used by the `Emulator` interface.