Add IsRegisteredWithUD functor

Sources/ElixxirDAppsSDK/Functors/IsRegisteredWithUD.swift

+import Bindings
+import XCTestDynamicOverlay
+
+public struct IsRegisteredWithUD {
+  public var run: (Int) throws -> Bool
+
+  public func callAsFunction(e2eId: Int) throws -> Bool {
+    try run(e2eId)
+  }
+}
+
+extension IsRegisteredWithUD {
+  public static let live = IsRegisteredWithUD { e2eId in
+    var result: ObjCBool = false
+    var error: NSError?
+    BindingsIsRegisteredWithUD(
+      e2eId,
+      &result,
+      &error
+    )
+    if let error = error {
+      throw error
+    }
+    return result.boolValue
+  }
+}
+
+extension IsRegisteredWithUD {
+  public static let unimplemented = IsRegisteredWithUD(
+    run: XCTUnimplemented("\(Self.self)")
+  )
+}