* Converted Z80 to use emulator-hal traits
* Updated emulator-hal
* Added a hacky Signalable trait to replace the Z80 signals
* Minor fixes
* Fixed timing tests and added no io tests option
* Fixed genesis Z80 bus issue
* Fixed addressing for BusAccess impl of Z80
* Fixed tests and clippy lints
* Added github actions for PRs
* Added some rustfmt::skip attributes
* Applied formatting
* Added rustfmt component in action
* Configured to use rustfmt version 2 which fixes some comment formatting
* Removed ready_for_review condition for github actions
Since it has the synchronize condition, it will update after each
commit, whether in draft or not, so I think this should be alright
Now it's up to 99% tests passing, 15362 are still failing, but many
of those are the unimplemented IN/OUT instructions, which the Genesis
doesn't seem to use
Special thanks to raddad772 https://github.com/raddad772
Also added some fixes to the Z80 for panicking math operations, but
it still won't complete due to an unimplemented instruction
I wanted to make this a bit more modular, so it's easier in theory to
write external crates that can reuse bits, and selectively compile in
bits, such as adding new systems or new cpu implementations
There are still some failures on the SBCD, but the logic is identical
to other emulator's calculations, but the test case doesn't seem to be
the way it should behave, so I'll leave it for now
The I/N bit in the special status word on the stack should be set
when returning from RTE results in a PC that isn't word aligned.
Every other case pretty much, it should be clear
