chore(@toss/hangul): deprecated @toss/hangul and convert to es-hangul

[okinawaa]

Overview

Changes Proposed

This PR marks the deprecation of @toss/hangul and transitions to using es-hangul by reexporting functionalities directly from the new package. This shift aims to streamline our support and maintenance efforts while providing users with improved and more efficient functionalities.

Actions for Users

• Users should update their dependencies to utilize es-hangul.
• Consult the updated README.md for guidance on the transition and links to the new documentation.

Rationale

The transition to es-hangul ensures that our package stays up-to-date with the latest best practices in handling Korean language processing, leveraging newer, more performant technologies.

Additional Notes

• All previous functionalities available in @toss/hangul are now accessible via es-hangul, with substantial enhancements.
• Please see the attached documentation link for detailed instructions and new features.

https://es-hangul.slash.page/

PR Checklist

• I read and included theses actions below

1. I have read the Contributing Guide
2. I have written documents and tests, if needed.

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[evan-moon]

LGTM

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[manudeli]

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