⭐️ Impl: Add RNIModalViewController

Related:
* `TODO:2023-03-31-18-33-34` - Unify/streamline/consolidate logic for invoking modal focus/blur.
* `TODO:2023-03-31-18-37-00` - Impl. `RNIViewControllerLifeCycleNotifiable` protocol.

ios/src_library/Helpers+Utilities/RNIViewControllerLifeCycleNotifiable.swift

@@ -0,0 +1,68 @@
+//
+//  RNIViewControllerLifeCycleNotifiable.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 4/1/23.
+//
+
+import Foundation
+
+protocol RNIViewControllerLifeCycleNotifiable: AnyObject {
+
+  func viewDidLoad(sender: UIViewController);
+
+  func viewDidLayoutSubviews(sender: UIViewController);
+
+  func viewWillAppear(sender: UIViewController, animated: Bool);
+
+  func viewDidAppear(sender: UIViewController, animated: Bool);
+
+  /// `Note:2023-04-01-14-39-23`
+  ///
+  /// * `UIViewController.isBeingDismissed` or
+  ///   `UIViewController.isMovingFromParent` are `true` during
+  ///   `viewWillDisappear`, whenever a modal is about to be dismissed.
+  ///
+  func viewWillDisappear(sender: UIViewController, animated: Bool);
+
+  func viewDidDisappear(sender: UIViewController, animated: Bool);
+
+  func willMove(sender: UIViewController, toParent parent: UIViewController?);
+
+  func didMove(sender: UIViewController, toParent parent: UIViewController?);
+
+};
+
+extension RNIViewControllerLifeCycleNotifiable {
+  func viewDidLoad(sender: UIViewController) {
+    // no-op
+  };
+
+  func viewDidLayoutSubviews(sender: UIViewController) {
+    // no-op
+  };
+
+  func viewWillAppear(sender: UIViewController, animated: Bool) {
+    // no-op
+  };
+
+  func viewDidAppear(sender: UIViewController, animated: Bool) {
+    // no-op
+  };
+
+  func viewWillDisappear(sender: UIViewController, animated: Bool) {
+    // no-op
+  };
+
+  func viewDidDisappear(sender: UIViewController, animated: Bool) {
+    // no-op
+  };
+
+  func willMove(sender: UIViewController, toParent parent: UIViewController?) {
+    // no-op
+  };
+
+  func didMove(sender: UIViewController, toParent parent: UIViewController?) {
+    // no-op
+  };
+};