Made read MMU a non mutable operation.
Added support for CPU description.
Added Display support for CPU.
Extracted type definition for `Instruction`.
Support for diag_gb!() - uses global unsafe approach, which is not problematic for the purpose.
Inline fetch() operation in cpu clock.
Moved pedantic validation up in the CPU.
Fix simple diag issue.
Changed naming of read and write unsafe ops to raw.
New pedantic asserts.
Fix an issue with HDMA destination address prevent CHIP-8 ROM from
working.

More standard support for the `BusComponent` interface.

Made the testing of the timer work.

Also made some initial timer validation.

Running under a single call.
This required increasing variable size from u8 to u16.

Also removed the not needed bitwise operation.

There's already two drivers implemented: Null and Print (to stdout).

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

Made test on inst timing pass

large instructions values