Feat: 공통 컴포넌트 추가 - 하단 탭 바 #20

[SEMINSEMINSEMIN]

코드 리뷰해주실 때 보시면 되는 파일 목록입니다.

• https://github.com/nailedReact/react-app/pull/27/files#diff-9399c9ebcaa0af4bad204f483cda149536890cbc51bfcdff576864d73103c067
• https://github.com/nailedReact/react-app/pull/27/files#diff-453e3b9b5f120f7ea9f9fdace8296fe2a1124cbb9d74e04bd17e7cc814636404
• https://github.com/nailedReact/react-app/pull/27/files#diff-22d2c3367f05e04db12a626facac1db67763b891ca6253b225f1f50344ecf38b
• https://github.com/nailedReact/react-app/pull/27/files#diff-22d2c3367f05e04db12a626facac1db67763b891ca6253b225f1f50344ecf38b

  NavBarItem.jsx의 useEffect에 관하여

  https://github.com/nailedReact/react-app/issues/20#issuecomment-1344100928