fix(frontend): TypeScriptの型チェック対象ファイルを限定して高速化するように

[kakkokari-gtyih]

What

Modifies the frontend and frontend-embed TS configs to include only the project source. This fixes type errors and slow linting caused by TS trying to check the JS-based config files and various auto-generated code.

TypeScriptが自動生成されたファイルやJavaScriptで書かれたコンフィグファイルまでチェックしてしまい、型チェックが遅くなる問題を修正（tsconfigのsourceをプロジェクトルートに限定）

Why

Additional info (optional)

Checklist

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

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 19.32%. Comparing base (0df6c79) to head (af5fbb5). Report is 1 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #14994 +/- ## ============================================ - Coverage 39.97% 19.32% -20.66% ============================================ Files 1561 727 -834 Lines 197313 103687 -93626 Branches 3622 990 -2632 ============================================ - Hits 78878 20033 -58845 + Misses 117829 83101 -34728 + Partials 606 553 -53 ```

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[syuilo]

🙏