feat: Type-erased mutations

[plajdo]

Type-erasure now erases Mutation type as well as original concrete Reactor class type.

[Copilot]

Pull Request Overview

This PR implements type-erased mutations in the GoodReactor framework by introducing an AnyReactor wrapper that erases both the concrete Reactor type and its Mutation type. This allows views to work with different reactor implementations that share the same action/state interface but have different internal mutation types.

• Introduces AnyMutation struct for type-erased mutations
• Implements AnyReactor with dynamic member lookup for state access
• Adds comprehensive test coverage for the new type-erased functionality

Reviewed Changes

Copilot reviewed 12 out of 21 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
Tests/GoodReactorTests/GoodReactorTests.swift	Updates test assertions to use direct property access instead of .state property
Tests/GoodReactorTests/AnyReactorTests.swift	New comprehensive test suite for AnyReactor functionality
Sources/GoodReactor/Utils/EventTaskCounter.swift	Extracts EventTaskCounter into separate file, removes unrelated Event code
Sources/GoodReactor/Core/Reactor.swift	Removes deprecated currentState property
Sources/GoodReactor/Core/Identifier.swift	Moves EventIdentifier to Event.swift file
Sources/GoodReactor/Core/Event.swift	New file containing Event class and type-erasure utilities
Sources/GoodReactor/Core/Erased/AnyReactorBoxProtocol.swift	Protocol defining interface for type-erased reactor boxes
Sources/GoodReactor/Core/Erased/AnyReactorBox.swift	Implementation of reactor box that forwards calls to concrete reactor
Sources/GoodReactor/Core/Erased/AnyReactor.swift	Main AnyReactor class with dynamic member lookup and type erasure
Sources/GoodReactor/Core/Erased/AnyMutation.swift	Type-erased mutation wrapper
Sources/GoodReactor/AnyReactor.swift	Removes old AnyReactor implementation
README.md	Updates test coverage percentage from 69% to 83%

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[Copilot]

The filename comment should be 'AnyMutation.swift' to match the actual filename, not 'Mutation.swift'.

Suggested change

	// Mutation.swift
	// AnyMutation.swift

[Copilot]

The error message refers to type(of: anyMutation) which will show the type of AnyMutation rather than the actual underlying mutation type. Consider using type(of: anyMutation.enum) to show the concrete mutation type that failed to cast.

Suggested change

	fatalError("Unexpected mutation type: \(type(of: anyMutation)), expected \(Base.Mutation.self)")
	fatalError("Unexpected mutation type: \(type(of: anyMutation.enum)), expected \(Base.Mutation.self)")