chore: update issue and PR templates for community guidelines

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,17 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Questions & Ideas / 问题与想法（Discussions）
+    url: https://github.com/alibaba/page-agent/discussions
+    about: Use Discussions for Q&A and ideation. 使用 Discussions 进行问答与想法交流。
+  - name: Security Report / 安全问题报告
+    url: https://github.com/alibaba/page-agent/security/policy
+    about: Report security vulnerabilities responsibly. 通过安全页面报告漏洞。
+  - name: Contributing Guide / 贡献指南
+    url: https://github.com/alibaba/page-agent/blob/main/CONTRIBUTING.md
+    about: How to contribute code and ideas. 如何进行贡献与提交代码。
+  - name: Code of Conduct / 行为准则
+    url: https://github.com/alibaba/page-agent/blob/main/CODE_OF_CONDUCT.md
+    about: Community expectations and standards. 社区行为期望与标准。
+  - name: 行为准则（中文）
+    url: https://github.com/alibaba/page-agent/blob/main/CODE_OF_CONDUCT_zh.md
+    about: 中文版社区行为准则。