docs: add customized HER Hack-Astron issue template

[FenjuFu]

What changed

• Add a repository-specific HER Hack-Astron challenge proposal template.
• Pre-fill \HER Hack-Astron #出题｜赛题名称\ and apply the \HER Hack-Astron\ label.
• Keep proposals unofficial until @FenjuFu reviews them, assigns the round number, and renames the issue.
• Customize challenge directions, deliverables, acceptance criteria, review dimensions, and safety constraints for this project.

Repository-specific design

• Focus: 智能家居意图与槽位解析、长尾口语/方言、数据训练、端侧性能和安全确认
• Evidence used: 要求数据卡、分组指标、泄漏检查、模型大小/延迟和高风险指令拒绝

Contributor impact

Community partners can propose challenges that produce changes aligned with this repository instead of submitting a generic Agent demo. The template also preserves the HER Hack-Astron rule that women must represent at least 50% of contributors recorded in PR commits.

Validation

• Valid Markdown issue-template frontmatter
• Required title, label, reviewer, and participation fields checked
• Template committed directly from the latest default branch

[dongjiang1989]

@FenjuFu Sign DCO, Please

[FenjuFu]

Thanks for the reminder. The commit has been re-signed with a matching author email and Signed-off-by identity. The DCO check is now passing.

[FenjuFu]

该 PR 已等待了一段时间，期间没有其他维护者接手处理。现已完成统一复核：变更仅新增仓库定制的 HER Hack-Astron issue 模板，未发现阻塞问题，CLA/DCO 及现有 CI 均通过，因此按维护决策合并。