Easier NSTextView/UITextView and SwiftUI

dependencies: [
    .package(url: "https://github.com/ChimeHQ/Textbook", branch: "main")
],

This is an NSTextView subclass that aims for an absolute minimal amount of changes. Things are allowed only if they are required for correct functionality. It is intended to be a drop-in replacement for NSTextView, and should maintain compatibilty with existing subclasses. Behaviors are appropriate for all types of text.

• Additional routing to NSTextViewDelegate.textView(_:, doCommandBy:) -> Bool: paste, pasteAsRichText, pasteAsPlainText
• Hooks for onKeyDown, onFlagsChanged, onMouseDown
• Configurable selection notifcation delivery via continuousSelectionNotifications

I would love to hear from you! Issues or pull requests work great. A Matrix space is also available for live help, but I have a strong bias towards answering in the form of documentation.

I prefer collaboration, and would love to find ways to work together if you have a similar project.

I prefer indentation with tabs for improved accessibility. But, I'd rather you use the system you want and make a PR than hesitate because of whitespace.

By participating in this project you agree to abide by the Contributor Code of Conduct.