Introduce WithViewStore.init(_:observe:send:...) (#1339)

* wip

* Introduce `WithViewStore.init(_:observe:send:...)`

* Update examples

* wip

* typo

* wip

(cherry picked from commit bef2084cb26263f08a959aa00b127edfbc2df267)

# Conflicts:
#	Sources/ComposableArchitecture/Internal/Deprecations.swift
#	Sources/ComposableArchitecture/SwiftUI/IfLetStore.swift
#	Sources/ComposableArchitecture/SwiftUI/TextState.swift
#	Sources/ComposableArchitecture/SwiftUI/WithViewStore.swift

Author: stephencelis

Examples/CaseStudies/SwiftUICaseStudies/00-Core.swift

@@ -3,7 +3,7 @@ import ReactiveSwift
 import UIKit
 import XCTestDynamicOverlay
 
-struct RootState {
+struct RootState: Equatable {
   var alertAndConfirmationDialog = AlertAndConfirmationDialogState()
   var animation = AnimationsState()
   var bindingBasics = BindingBasicsState()