Allowing multiple SwiftGodot users at the same time.

[migueldeicaza]

In the new branch shared-core I am experimenting with rebuilding GodotApplePlugins to separate SwiftGodot from the plugin themselves, so other folks can create their own add ons without having to fork and extend GodotApplePlugins.

Remember that one of the challenges we have is with Xcode build tools that bloat our binary and because of this, I had to work on the script to avoid that scenario - our binaries are large because I am shipping "mergeable libraries" - that is Apple's fancy term to enable dynamic linking during development (faster iteration) and static linking for release (smaller binary, faster startup) I think that the new branch works, please take it for a spin.

I have a new sample that shows how to use it along with this branch: https://github.com/migueldeicaza/SimpleGodotAddon