fix: reset shouldIgnoreKeyboardEvents to false on resignFirstResponder (#996)

## 📜 Description

Fixed missing keyboard events after dismissing a screen from
native-stack via interactive gesture + using `KeyboardGestureArea`.

## 💡 Motivation and Context

The problem happens because of this code:

```swift
guard !KeyboardEventsIgnorer.shared.shouldIgnore else {
  KeyboardEventsIgnorer.shared.shouldIgnoreKeyboardEvents = false
  return
}
```

This code filters out a subsequent event when we attach
`InvisibleAccessoryView`.

When we call `resignFirstResponder` we call:

```swift
public func hide() {
  if isVisible {
    NotificationCenter.default.post(
      name: .shouldIgnoreKeyboardEvents, object: nil, userInfo: ["ignore": true]
    )
    currentInputAccessoryView?.hide()
  }
}
```

Because we detach the `InvisibleAccessoryView` and it'll trigger
`keyboardDidAppear` event too. And it works well for plain dismissal
(tap-to-dismiss) or after interactive dismissal. But in native-stack
when you do a swipe-left-to-dismiss-screen the keyboard is associated
with the screen and we will not get additional `keyboardDidAppear`
event, so `shouldIgnore` field will be always `true`. And will be reset
only when keyboard gets shown again.

To solve that problem I decided to add the code:

```swift
NotificationCenter.default.post(
  name: .shouldIgnoreKeyboardEvents, object: nil, userInfo: ["ignore": false]
)
```

That will be triggered before a call to original `resignFirstResponder`.
I tested 3 scenarios:
- tap to dismiss;
- interactive swipe to dismiss;
- swipe screen to dismiss.

And all of them work without any regressions, so I think it's safe to
have this code and automatically reset the flag when the view gets
detached 🤞

## 📢 Changelog

<!-- High level overview of important changes -->
<!-- For example: fixed status bar manipulation; added new types
declarations; -->
<!-- If your changes don't affect one of platform/language below - then
remove this platform/language -->

### iOS

- reset `shouldIgnoreKeyboardEvents` to `false` on
`resignFirstResponder`;

## 🤔 How Has This Been Tested?

Tested manually on iPhone 16 (iOS 18.4).

## 📸 Screenshots (if appropriate):

|Before|After|
|-------|-----|
|<video
src="https://github.com/user-attachments/assets/acaf97f2-87d6-429a-b704-7d104abbba22">|<video
src="https://github.com/user-attachments/assets/63e704aa-2b6f-4058-83ff-0cf6dcbca06c">|

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed

Author: pioner92

ios/swizzling/UIResponderSwizzle.swift

@@ -72,6 +72,9 @@ extension UIResponder {
 
       // Postpone execution of the original resignFirstResponder
       DispatchQueue.main.asyncAfter(deadline: .now() + UIUtils.nextFrame) {
+        NotificationCenter.default.post(
+          name: .shouldIgnoreKeyboardEvents, object: nil, userInfo: ["ignore": false]
+        )
         (self as? TextInput)?.inputAccessoryView = nil
         KeyboardAreaExtender.shared.remove()
         _ = self.callOriginalResignFirstResponder(originalResignSelector)