feat(fe): unify indent in code editor

[egg-zz]

Description

코드에디터 내에서 들여쓰기가 불규칙하게 되는 문제 수정
코드에디터 내 여백 부분을 눌러도 line이 활성화되도록 수정

+) 제 환경에서 들여쓰기 자동화가 되지 않아 일단은 들여쓰기 없이 수정해두었습니다,,,,, 의견 있으시면 말씀주세요!

Additional context

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• Read the Contributing Guidelines
• Read the Contributing Guidelines and follow the Commit Convention
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

close TAS-2412

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