refactor: rename package in ui layer

[keigomichi]

Issue 番号

• Close #

変更内容

• package:thundercard/views/pages -> package:thundercard/ui/screen
• package:thundercard/views/widgets -> package:thundercard/ui/component

この PR はマージ可能な状態ですか

[x] Yes
[ ] No

確認事項

• [ ]

その他

-

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 88c6dce):

https://thundercard-test--pr675-keigomichi-rename-ui-sga4tc9k.web.app

_{(expires Tue, 11 Jul 2023 00:52:27 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: 91a64f297bd76062cbdd71a4d05a773a6166c553}

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (3bb2033) 90.47% compared to head (88c6dce) 90.47%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #675 +/- ## ======================================= Coverage 90.47% 90.47% ======================================= Files 1 1 Lines 42 42 ======================================= Hits 38 38 Misses 4 4 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.