온보딩 step2 리팩토링

[hansol-FE]

🤔 해결하려는 문제가 무엇인가요?

• close #184

🎉 어떻게 해결했나요?

• 공통으로 만든 Graphic을 이용해 아이콘 수정했어요
• step2에서 선택한 소지품들 담을 store 생성했어요
• 온보딩에서 사용할 constants들 따로 분리했어요
• 상단 AppBar 추가했어요

📚 Attachment (Option)

[codecov-commenter]

Codecov Report

Base: 98.61% // Head: 98.61% // No change to project coverage :thumbsup:

Coverage data is based on head (c8b9025) compared to base (ba1b17c). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #197 +/- ## ======================================= Coverage 98.61% 98.61% ======================================= Files 23 23 Lines 216 216 Branches 45 45 ======================================= Hits 213 213 Misses 3 3 ``` | [Impacted Files](https://codecov.io/gh/depromeet/ahmatda-web/pull/197?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=depromeet) | Coverage Δ | | |---|---|---| | [src/components/item/Item.tsx](https://codecov.io/gh/depromeet/ahmatda-web/pull/197/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=depromeet#diff-c3JjL2NvbXBvbmVudHMvaXRlbS9JdGVtLnRzeA==) | `100.00% <ø> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=depromeet). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=depromeet)

:umbrella: View full report at Codecov.
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[github-actions[bot]]

Bundle Sizes

Compared against ba1b17c04fe405287813e9790d2f728ba681e78d

Route	Size (gzipped)	Diff
/onboard/step1	83.38 KB	+4.29 KB
/onboard/step2	83.87 KB	+6.44 KB

Dynamic import: No significant changes found

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