This also adds separate `TokamakDemo` module in the main project, which will host all examples that can be cross-platform. A few `Style` properties were removed, which were duplicated in UIKit and duplicated versions couldn't be cleanly mapped in AppKit. `contentMode` was moved from `Style` to `Image` as `NSView` doesn't have `contentMode` at all, and for UIKit the only use that I know of is related to `UIImage` anyway.
Resolves#1
* Mostly empty TokamakAppKit module, fix copyright text
* Add TokamakDemo module, working counter on macOS
* Fix layer props and accessibility for AppKit
* Fix linter issues, completely remove `center` prop
* Fix line length in NSViewComponent
* Remove unused and broken ScrollView for AppKit
* Add macOS column to StandardComponents.md
* Make contentMode on Image non-optional
* Fix missing initializer call in ImageView.swift
* Change the domain name for the docs dir
* Fix TokamakAppKit after text Children -> Props fix
de0726914c