feat: Adds onFailure reducer.

Sources/ComposableSubscriber/Internal/SetAction.swift

@@ -1,49 +0,0 @@
-import ComposableArchitecture
-import Foundation
-
-@usableFromInline
-enum SetAction<State, Action, Value> {
-  case operation(f: (inout State, Value) -> Effect<Action>)
-  case keyPath(WritableKeyPath<State, Value>, effect: Effect<Action>)
-  case optionalKeyPath(WritableKeyPath<State, Value?>, effect: Effect<Action>)
-
-  @usableFromInline
-  func callAsFunction(state: inout State, value: Value) -> Effect<Action> {
-    switch self {
-    case let .operation(f: f):
-      return f(&state, value)
-    case let .keyPath(keyPath, effect):
-      state[keyPath: keyPath] = value
-      return effect
-    case let .optionalKeyPath(keyPath, effect):
-      state[keyPath: keyPath] = value
-      return effect
-    }
-  }
-  
-  @usableFromInline
-  static func operation(_ f: @escaping (inout State, Value) -> Void) -> Self {
-    .operation(f: { state, value in
-      f(&state, value)
-      return .none
-    })
-  }
- 
-}
-
-@usableFromInline
-struct SetAction2<State, Action, Value> {
-  let operation: @Sendable (inout State, Value) -> Void
-  
-  init(_ operation: @escaping @Sendable (inout State, Value) -> Void) {
-    self.operation = operation
-  }
-  
-  static func keyPath(
-    _ keyPath: WritableKeyPath<State, Value>
-  ) -> Self {
-    .init({ state, value in
-      state[keyPath: keyPath] = value
-    })
-  }
-}