feat(ios): add iOS orientation

[lisicold]

Pre-PR Checklist

• I added/updated relevant documentation.
• I followed the Convention Commit guideline with maximum 72 characters to submit commit message.
• I squashed the repeated code commits.
• I signed the [CLA].
• I added/updated test cases to check the change I am making.
• All existing and new tests are passing.

[tencent-adm]

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[hippy-service]

Hi, @lisicold. Thanks for your PR! 👏

🏷️ You can leave a comment in this PR with #help tag when you need help (e.g. some status checks run failed due to internal issue), admin team members will help asap.

[hippy-service]

After a quick scan, I have approved workflow to run.

• SHA: 2a1bcff

🏷️ New commits in this PR would not be tested automatically until this pull request is reviewed by our collaborators.
🏷️ No need to worry about the status of merge_guard and [gh] pull request merge guard / merge_guard (pull_request_target) checks, once this pull request is met merge requirements, it will be automatically converted to successful status.

[wwwcg]

可能需修改对齐，等待Android端提交后一同合入

[wwwcg]

该PR有几点问题：
1、此处监听通知并不会及时通知到 js侧，仅是native层刷新。真正hippyExportedDimensions依赖的是UIApplicationDidChangeStatusBarOrientationNotification这个通知。
2、UIDeviceOrientationDidChangeNotification是设备方向变化通知，绑定给前端的orientation变量含义是有歧义的，是“设备方向”？还是“页面布局方向”？，最佳做法可能是提供两个变量进行区分。
3、首次获取方向的代码需优化，避免出现Magic Number等，类似这种(interfaceOrientation - deviceOrientation == 0)

[hippy-service]

Hi, @lisicold, I noticed that our reviewers requested changes to this pull request.
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