Adding external calling function parameter type hints

[MoonJeWoong]

Description

Python doesn't provide access modifier, so i added type hints based on the methods called by the ~test.py files run in the tox script. However, the type hints provided by Python do not perform static type checking, so they cannot detect runtime errors in advance. Therefore, I think we can consider introducing static type checking in the next step with a tool like Mypy.
As soon as i'm done with this PR, i'll be doing some research on Mypy.

Related: #170

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation update
• Refactoring, Maintenance
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[soimkim]

@MoonJeWoong 님, 하기 사항 확인 부탁드립니다.

=================================== FAILURES ===================================
_________________________________ FLAKE8-check _________________________________
/home/runner/work/fosslight_util/fosslight_util/src/fosslight_util/set_log.py:47:131: E501 line too long (157 > 130 characters)