ErrorKit: Global mechanism to handle errors (destructured)

[Jeehut]

Problem solved:

Using typed throws leads to a nested hierarchy of errors that can be annoying handle all cases

Provide a global mechanism to handle all these kinds of nested errors (using a protocol?) in a away that destructures them automatically and provides the chain and the detailed error (context + detail) in a good balance, even for very deep nesting

This should contian useful view modifiers or global UIKit/AppKit handlers if possible

[Jeehut]

NOTE: A UI app could be used like in String Catalogs to right-click a specific nested error case and find the locations it was thrown in. And it could automatically even filter by the nested cases to ensure it filters out any places that are not throwing this specific error. But this requires usage of swift-syntax and parsing of the whole codebase, so probably an "advanced" future in a later version.