[FIX, DOCS] Fix Korean interactive init guide indexing error

[bnbong]

Summary

Fix the Korean docs issue where the fastkit init --interactive guide content is indexed or rendered incorrectly.

Reference

• Existing issue: Korean guide document translation error #37

Scope

• Fix the broken Korean page content/heading/indexing around the interactive init description
• Verify the rendered Korean docs page matches the intended section structure
• Make the smallest safe change needed to fix the visible issue
• Update related Korean content only if necessary for consistency

Out of Scope

• Large-scale Korean translation rewrite
• General translation quality improvements outside this bug

Acceptance Criteria

• The Korean page no longer shows the reported indexing/rendering problem
• mkdocs build passes after the fix
• The corrected page reflects the current v1.2.x/v1.3.0 interactive behavior accurately

[bnbong]

Implemented in #54.

This tracking issue was completed as part of PR #54, which applied the Korean interactive init guide fix and aligned the related documentation with the current interactive flow.

Closing as completed.