docs: Fix documentation errors in FAQ page

[wo-o29]

Summary

This PR fixes several documentation errors found in the FAQ page, including typos, JavaScript syntax errors, React Hook dependency issues, markdown escaping problems, and misplaced code examples.

Changes

1. Fixed typo in "React Hook Form, Formik or Redux Form?" section

Changed "Additionallly" to "Additionally" (removed extra 'l').

2. Fixed JavaScript syntax in "How to share ref usage?" section

The JavaScript example incorrectly used TypeScript's non-null assertion operator (!).

3. Fixed React Hook dependency in "What if you don't have access to ref?" section

Added missing register dependency to the useEffect hook dependency array to comply with React Hooks rules.

4. Fixed markdown escaping in "How to work with modal or tab forms?" section

Removed unnecessary backslash escaping from inline code around useForm.

5. Removed misplaced code in "Why is the first keystroke not working?" section

Removed IE11 import examples that were unrelated to the question about first keystroke issues. These imports don't provide relevant information for troubleshooting the value vs defaultValue problem described in the section.

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