#73: Work In Progess AEGP support

[mobile-bungalow]

currently the demo under examples/aegp compiles and runs on macos, it has kinks to iron out but currently adds a menu item "grabber" that creates a file dialog and saves a frame as PNG provided it has 8bit channel depth. I will update this as I have more time.

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notes: I have implemented Register suite twice, once for AEGPs and once for effects. The difference being that effects will never reserve a global refcon, so the argument is useless. I have also omitted the AEIO and Artisan plugin callbacks from the register suite for now, they would represent a time commitment I do not have right now.

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TODO:

• [ ] Write a effect example using the non-aegp register suite. A prime example would be an effect plugin that generates a PNG footage object or video then uses it. An optical flow example would be an excellent use case as it requires a window of frames to be grabbed.
• [ ] Update pipl to generate the PKGInfo and Plist on macos, pare down the justfiles
• [ ] Windows testing