feat(commands): add custom QC commands for GitHub workflows

Add four new custom commands for Qwen Code CLI:
- code-review: Review pull requests with detailed analysis
- commit: Generate commit messages and push changes
- create-issue: Draft and submit GitHub issues
- create-pr: Create well-structured pull requests

These commands provide structured workflows for common GitHub operations.

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

.qwen/commands/qc/code-review.md

@@ -0,0 +1,25 @@
+---
+description: Code review a pull request
+---
+
+You are an expert code reviewer. Follow these steps:
+
+1. If no PR number is provided in the args, use Bash(\"gh pr list\") to show open PRs
+2. If a PR number is provided, use Bash(\"gh pr view <number>\") to get PR details
+3. Use Bash(\"gh pr diff <number>\") to get the diff
+4. Analyze the changes and provide a thorough code review that includes:
+   - Overview of what the PR does
+   - Analysis of code quality and style
+   - Specific suggestions for improvements
+   - Any potential issues or risks
+
+Keep your review concise but thorough. Focus on:
+- Code correctness
+- Following project conventions
+- Performance implications
+- Test coverage
+- Security considerations
+
+Format your review with clear sections and bullet points.
+
+PR number: {{args}}