[CDX-265] Add Claude Code GitHub Workflow

[esezen]

🤖 Installing Claude Code GitHub App

This PR adds a GitHub Actions workflow that enables Claude Code integration in our repository.

What is Claude Code?

Claude Code is an AI coding agent that can help with:

• Bug fixes and improvements
• Documentation updates
• Implementing new features
• Code reviews and suggestions
• Writing tests
• And more!

How it works

Once this PR is merged, we'll be able to interact with Claude by mentioning @claude in a pull request or issue comment.
Once the workflow is triggered, Claude will analyze the comment and surrounding context, and execute on the request in a GitHub action.

Important Notes

• This workflow won't take effect until this PR is merged
• @claude mentions won't work until after the merge is complete
• The workflow runs automatically whenever Claude is mentioned in PR or issue comments
• Claude gets access to the entire PR or issue context including files, diffs, and previous comments

Security

• Our Anthropic API key is securely stored as a GitHub Actions secret
• Only users with write access to the repository can trigger the workflow
• All Claude runs are stored in the GitHub Actions run history
• Claude's default tools are limited to reading/writing files and interacting with our repo by creating comments, branches, and commits.
• We can add more allowed tools by adding them to the workflow file like:

allowed_tools: Bash(npm install),Bash(npm run build),Bash(npm run lint),Bash(npm run test)

There's more information in the Claude Code action repo.

After merging this PR, let's try mentioning @claude in a comment on any PR to get started!

[Copilot]

Pull Request Overview

This PR adds GitHub Actions workflows to integrate Claude Code AI agent into the repository for automated assistance and code review.

• Adds two GitHub workflows: one for interactive Claude commands triggered by @claude mentions, and another for automatic code reviews on pull requests
• Configures appropriate permissions and security settings for Claude to interact with repository content
• Sets up customizable prompts and tool permissions for different use cases

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/claude.yml	Interactive Claude workflow triggered by @claude mentions in comments
.github/workflows/claude-code-review.yml	Automatic Claude code review workflow for pull requests

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The workflow is missing write permissions for pull-requests and issues that Claude would need to create comments, branches, and commits as mentioned in the PR description. Consider adding 'pull-requests: write' and 'issues: write' permissions.

Suggested change

	pull-requests: read
	issues: read
	pull-requests: write
	issues: write

[Copilot]

The code review workflow is missing write permissions for pull-requests that would be needed for Claude to leave review comments on PRs as specified in the prompt. Consider adding 'pull-requests: write' permission.

Suggested change

	pull-requests: read
	pull-requests: write

[Copilot]

The prompt references a 'CLAUDE.md' file for style and conventions, but this file is not included in the PR. Either add the CLAUDE.md file or remove this reference from the prompt.

Suggested change

	Use the repository's CLAUDE.md for guidance on style and conventions. Be constructive and helpful in your feedback.
	Be constructive and helpful in your feedback.