Add Apple Silicon support

[MaddTheSane]

OpenEmu 2.4.1 had to ship without the Apple Silicon slice on its executable. That and there are a few cores that don't have an Apple Silicon version (PCSX2).

There's a few things that needs to be done:

• Work on creating a signing workflow that will at least let a casual user allow access even if it's not signed by a developer account.
• Port as many cores as possible to ARM64.
• Add a workaround that would let Apple Silicon Macs launch cores under Rosetta 2. Last I heard, @J-rg was working on doing this.

[shinra-electric]

For what it's worth, PCSX2 will get arm64 support "soon-ish"

[ideologysec]

Would AetherSX2 which already has an ARM macOS version be a possible replacement or interim solution until PCSX2 is ready?

[MaddTheSane]

If the source code for AetherSX2 was available, yes.

[stenzek]

FYI, as a PCSX2 copyright holder, you cannot use PCSX2 (or any GPL-licensed emulator for that matter), as you're shipping GPL-incompatible code. Doesn't matter if it's loaded via a shared library or not. it's still a combined work. Furthermore, unless all third-party copyright notices are included, as we do in our UI, you're also violating their licenses as well.

(I only knew about this since you pinged our repo.... :p)

[MaddTheSane]

What part of OpenEmu isn't GPL-compliant?

[stenzek]

Not really my job to audit your code, I just poked around a bit and found files that weren't. Regardless, the point about third-party copyright statements still applies, and this is the case even with more permissive licenses.

Edit: To be clear, this isn't a formal complaint or anything, it's not like we have the funds to take legal action. Just a friendly heads up, since you're discussing knocking off our stuff before I even PR it.... :)