docs: Add GitHub issue and PR templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report an issue with an example, guide, or documentation
+title: "[BUG] "
+labels: bug
+assignees: ''
+
+---
+
+## Description
+Brief description of the issue.
+
+## Steps to Reproduce
+1. Step 1
+2. Step 2
+3. Step 3
+
+## Expected Behavior
+What should happen?
+
+## Actual Behavior
+What actually happened?
+
+## Environment
+- **Claude Code Version**: (e.g., 1.0.5)
+- **Operating System**: (e.g., macOS 14.1, Ubuntu 22.04, Windows 11)
+- **Python Version**: (if relevant, e.g., 3.11)
+- **Affected Component**: (e.g., 01-slash-commands, 03-skills, etc.)
+
+## Example Code
+If applicable, provide the example code that's not working:
+```
+[Insert code here]
+```
+
+## Screenshots
+If applicable, add screenshots showing the issue.
+
+## Additional Context
+Any other context that might help us understand the issue?
+
+## Possible Solution
+If you have a suggestion for fixing this, share it here.