refactor: reusable `TextInput` protocol

[kirillzyusko]

📜 Description

Put TextInput protocol in a separate directory to highlight that it's common protocol that can be re-used by other project files (not only traversal group).

💡 Motivation and Context

In preparation for offset functionality of interactive keyboard I discovered that we need to have common UITextField and UITextView interface to be able to manage some props without additional if-statements.

We already have our own TextInput protocol, so I thought we could benefit from it and extend it for future functionality. The only one thing is that now TextInput is associated with traversal group, but since it can be re-used by other groups I thought it would be better to move the file into its own separate group. That's what I did in this PR 🙂

📢 Changelog

iOS

• move TextInput file from traversal to protocol group;

🤔 How Has This Been Tested?

Tested on CI.

📝 Checklist

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

[github-actions[bot]]

📊 Package size report

Current size	Target Size	Difference
159558 bytes	159552 bytes	6 bytes 📈