Add auto-close functionality for duplicate issues

- Update dedupe command to include auto-close warning
- Add commit-push-pr command for streamlined workflow
- Add GitHub workflow to automatically close duplicates

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/commands/commit-push-pr.md

@@ -0,0 +1,19 @@
+---
+allowed-tools: Bash(git checkout --branch:*), Bash(git add:*), Bash(git status:*), Bash(git push:*), Bash(git commit:*), Bash(gh pr create:*)
+description: Commit, push, and open a PR
+---
+
+## Context
+
+- Current git status: !`git status`
+- Current git diff (staged and unstaged changes): !`git diff HEAD`
+- Current branch: !`git branch --show-current`
+
+## Your task
+
+Based on the above changes:
+1. Create a new branch if on main
+2. Create a single commit with an appropriate message
+3. Push the branch to origin
+4. Create a pull request using `gh pr create`
+5. You have the capability to call multiple tools in a single response. You MUST do all of the above in a single message. Do not use any other tools or do anything else. Do not send any other text or messages besides these tool calls.

.claude/commands/dedupe.md

@@ -30,6 +30,8 @@ Found 3 possible duplicate issues:
 
 If your issue is a duplicate, please close it and 👍 the existing issue instead.
 
+<sub>This issue will be automatically closed as a duplicate in 3 days if there are no additional comments. To prevent auto-closure, please 👎 this comment.</sub>
+
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