Add MakeReceptionIdentity functor

Sources/ElixxirDAppsSDK/Cmix.swift

 import Bindings
 
 public struct Cmix {
-  // TODO:
+  public var makeReceptionIdentity: MakeReceptionIdentity
 }
 
 extension Cmix {
   public static func live(_ bindingsCmix: BindingsCmix) -> Cmix {
-    Cmix()
+    Cmix(
+      makeReceptionIdentity: .live(bindingsCmix)
+    )
   }
 }
 
 extension Cmix {
-  public static let unimplemented = Cmix()
+  public static let unimplemented = Cmix(
+    makeReceptionIdentity: .unimplemented
+  )
 }

Sources/ElixxirDAppsSDK/MakeReceptionIdentity.swift

+import Bindings
+import XCTestDynamicOverlay
+
+public struct MakeReceptionIdentity {
+  public var run: () throws -> Data
+
+  public func callAsFunction() throws -> Data {
+    try run()
+  }
+}
+
+extension MakeReceptionIdentity {
+  public static func live(_ bindingsCmix: BindingsCmix) -> MakeReceptionIdentity {
+    MakeReceptionIdentity(run: bindingsCmix.makeReceptionIdentity)
+  }
+}
+
+extension MakeReceptionIdentity {
+  public static let unimplemented = MakeReceptionIdentity(
+    run: XCTUnimplemented("\(Self.self)")
+  )
+}