docs(ko): re-translation of korean documents

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Re-translation of Korean Documents

Improved the naturalness of some content.

Re-translated All Documents in the /guide/ Directory

• Corrected typos
• Adjusted content that should not have been translated
• Re-translated homophones and synonyms that arose during translation
• Standardized terminology used in the pinia and router documents
• Fixed incorrect external links

Updated Terms in the /config/ko.ts File

• Edited navigation menu text
• Updated other miscellaneous texts

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P.S. Due to the large volume of documents, I haven't been able to improve the documents within the /reference/ directory yet. However, I plan to work on them when my schedule allows.