Create pull request from current branch with AI-generated title and description.
Use when user wants to create a PR for their current branch. Triggers include:
- Korean: "PR 만들어줘", "PR 생성해줘", "풀 리퀘스트 만들어줘"
- English: "create PR", "open PR", "make pull request"
- Context: User has commits on current branch and wants to open PR