docs: add fix-github-issue command documentation

Author: cofyc

.claude/commands/fix-github-issue.md

@@ -0,0 +1,14 @@
+Please analyze and fix the GitHub issue: $ARGUMENTS.
+
+Follow these steps:
+
+1. Use `gh issue view` to get the issue details
+2. Understand the problem described in the issue
+3. Search the codebase for relevant files
+4. Implement the necessary changes to fix the issue
+5. Write and run tests to verify the fix
+6. Ensure code passes linting and type checking
+7. Create a descriptive commit message
+8. Push and create a PR
+
+Remember to use the GitHub CLI (`gh`) for all GitHub-related tasks.