chore: add missing SPDX ID and workflow check

[zyoshoka]

What

いくつかのファイルで欠落していた SPDX-License-Identifier の追加とワークフローによるチェックを追加しました。

Why

Resolves #13492

Additional info (optional)

zyoshoka#5 にて動作チェック済みです。

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[github-actions]

このPRによるapi.jsonの差分

差分はこちら

Get diff files from Workflow Page

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.84%. Comparing base (5c1d86b) to head (401e73f).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #13570      +/-   ##
===========================================
+ Coverage    64.83%   64.84%   +0.01%     
===========================================
  Files          986      986              
  Lines       111009   111054      +45     
  Branches      4424     5736    +1312     
===========================================
+ Hits         71974    72017      +43     
+ Misses       39003    37603    -1400     
- Partials        32     1434    +1402     

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[syuilo]

👍👍👍