feat(fe): test problem import extension

[jwoojin9]

Description

백준 문제 import 확장 프로그램과의 연동 가능성을 테스트하기 위한 PR입니다.

closes TAS-2505

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.

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