feat: detect commit update

[LegitYew0108]

• close feat:n分おきにGithubを確認し、更新を検知する #3
• close feat:Githubのリポジトリにアクセスできるようにする #2
  githubのAPIいじってたらgithubにアクセスするだけのつもりが更新検知まで実装できた

[Copilot]

Pull Request Overview

This PR implements GitHub commit update detection functionality by adding new GitHub API integration capabilities and a background monitoring task.

• Adds GitHub API client integration for fetching commit data
• Implements periodic commit monitoring to detect repository updates
• Refactors configuration structure to support GitHub API operations

Reviewed Changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 4 comments.

File	Description
controller/src/main.rs	Adds background task for periodic commit monitoring and updates main function structure
controller/src/github_access.rs	New module implementing GitHub API client for fetching commit information
controller/src/config.rs	Updates configuration structure to support GitHub API parameters and fixes test data
controller/Cargo.toml	Adds required dependencies for HTTP client, JSON handling, and environment variable loading

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[AsPulse]

とりあえずcargo fmtかけましょう (本来Ciで検知すべきなんだけどね……)
他の部分はあとで見るのでちょいまちください