ci: consolidate deno format, lint, and type checks into task commands

[Yusuke4869]

Summary by CodeRabbit

リリースノート

• その他
  • CI ワークフローの処理を更新しました。

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: a9f39536-b459-40e4-b8fa-479800dd2e57

📥 Commits

Reviewing files that changed from the base of the PR and between 4cfce8a and 41c5e0e.

📒 Files selected for processing (1)

• .github/workflows/ci.yml

📜 Recent review details

🔇 Additional comments (1)

.github/workflows/ci.yml (1)

23-24: LGTM!

Also applies to: 26-27

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📝 Walkthrough

Walkthrough

CI ワークフローの lint 関連ステップを整理。deno fmt --check・deno lint・deno check の3コマンドを、依存関係インストール（deno ci）とタスク実行（deno task lint）の2ステップに置き換えた。

Changes

CI ワークフロー更新

Layer / File(s)	Summary
Deno CI ステップの再構成 .github/workflows/ci.yml	deno fmt --check、deno lint、deno check の3コマンドを削除し、deno ci（依存関係インストール）と deno task lint の2ステップに置き換え。

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐇 ぴょんと跳ねて CI を整え
三つのコマンド、二つにまとめ
deno ci で依存を揃えたら
deno task lint でスッキリ走る
うさぎのワークフロー、シンプルが一番！ 🌿

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	プルリクエストのタイトルは、CI ワークフローで deno のコマンドを統合するという主な変更を正確に反映しており、変更内容と完全に関連しています。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/consolidate-deno-check-steps

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