docs(issue_template): add bug report template for GitHub issues

Add a standardized bug report template to help contributors provide consistent and complete information when reporting issues.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,28 @@
+---
+name: Bug report
+about: Report a problem or malfunction
+title: "[Bug] "
+labels: bug
+assignees: ""
+---
+
+## Describe the bug
+A clear and concise description of what the bug is.
+
+## To reproduce
+Steps to reproduce the behavior.
+
+## Expected behavior
+A clear and concise description of what you expected to happen.
+
+## Screenshots or logs
+If applicable, add screenshots or logs to help explain your problem.
+
+## Environment
+- OS:
+- Python:
+- GPU:
+- Package versions:
+
+## Additional context
+Add any other context about the problem here.