[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 assistant into the repository. The integration enables automated code review and on-demand AI assistance through @claude mentions in PRs and issues.

• Adds Claude Code workflow triggered by @claude mentions in comments, issues, and PR reviews
• Adds automated Claude Code Review workflow for pull requests with configurable filtering options
• Configures necessary permissions and security settings for the AI integrations

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/claude.yml	Main Claude Code workflow for @claude mentions with comprehensive event triggers
.github/workflows/claude-code-review.yml	Automated PR review workflow with customizable prompts and tool permissions

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