[cosh] feat(cosh): add /bug command for bug reports

[zkl123]

Component

cosh

Problem Statement

add /bug command：submit bug report
直接可以跳转到：GitHub bug 上报页面

Proposed Solution

add /bug command

Alternatives Considered

No response

Additional Context

No response

[github-actions]

🔀 Issue Triage

This issue has been automatically assigned to @kongche-jbw @samchu-zsl as the maintainer(s) of cosh.

Maintainers, please review and triage this issue. Set a priority label and update the status as needed. Thanks! 🙏