chore: import upstream snapshot with attribution

.github/ISSUE_TEMPLATE/bug-report.yml

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+name: 漏洞反馈
+description: 【供中文用户】报错或漏洞请使用这个模板创建，不使用此模板创建的异常、漏洞相关issue将被直接关闭。由于自己操作不当/不甚了解所用技术栈引起的网络连接问题恕无法解决，请勿提 issue。容器间网络连接问题，参考文档 https://link.langbot.app/zh/docs/network  
+title: "[Bug]: "
+labels: ["bug?"]
+body:
+  - type: input
+    attributes:
+      label: 运行环境
+      description: LangBot 版本、操作系统、系统架构、**Python版本**、**主机地理位置**
+      placeholder: 例如：v3.3.0、CentOS x64 Python 3.10.3、Docker
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: 部署版本
+      description: 请选择您使用的 LangBot 部署版本。
+      options:
+        - 社区版
+        - 云服务
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 异常情况
+      description: 完整描述异常情况，什么时候发生的、发生了什么。**请附带日志信息。** 
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 复现步骤
+      description: 提供越多信息，我们会越快解决问题，建议多提供配置截图；**如果涉及 Dify、n8n、Langflow 等外部平台，请提供应用的导出文件（如 Dify 应用的 DSL），我们将更快回复您。**
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: 启用的插件
+      description: 有些情况可能和插件功能有关，建议提供插件启用情况。
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/bug-report_en.yml

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+name: Bug report
+description: Report bugs or vulnerabilities using this template. For container network connection issues, refer to the documentation https://link.langbot.app/en/docs/network
+title: "[Bug]: "
+labels: ["bug?"]
+body:
+  - type: input
+    attributes:
+      label: Runtime environment
+      description: LangBot version, operating system, system architecture, **Python version**, **host location**
+      placeholder: "For example: v3.3.0, CentOS x64 Python 3.10.3, Docker"
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: Deployment version
+      description: Please select the LangBot deployment version you are using.
+      options:
+        - Community Edition
+        - Cloud Service
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Exception
+      description: Describe the exception in detail, what happened and when it happened. **Please include log information.** 
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Reproduction steps
+      description: How to reproduce this problem, the more detailed the better; the more information you provide, the faster we will solve the problem.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Enabled plugins
+      description: Some cases may be related to plugin functionality, so please provide the plugin enablement status.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature-request.yml

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+name: 需求建议
+title: "[Feature]: "
+labels: []
+description: "【供中文用户】新功能或现有功能优化请使用这个模板；不符合类别的issue将被直接关闭"
+body:
+  - type: dropdown
+    attributes:
+      label: 这是一个？
+      description: 新功能建议还是现有功能优化
+      options:
+        - 新功能
+        - 现有功能优化
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 详细描述
+      description: 详细描述，越详细越好
+    validations:
+      required: true
+      

.github/ISSUE_TEMPLATE/feature-request_en.yml

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+name: Feature request
+title: "[Feature]: "
+labels: []
+description: "New features or existing feature improvements should use this template; issues that do not match will be closed directly"
+body:
+  - type: dropdown
+    attributes:
+      label: This is a?
+      description: New feature request or existing feature improvement
+      options:
+        - New feature
+        - Existing feature improvement
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Detailed description
+      description: Detailed description, the more detailed the better
+    validations:
+      required: true
+      

.github/ISSUE_TEMPLATE/submit-plugin.yml

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+name: 提交新插件
+title: "[Plugin]: 请求登记新插件"
+labels: ["独立插件"]
+description: "【供中文用户】本模板供且仅供提交新插件使用"
+body:
+  - type: input
+    attributes:
+      label: 插件名称
+      description: 填写插件的名称
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 插件代码库地址
+      description: 仅支持 Github
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 插件简介
+      description: 插件的简介
+    validations:
+      required: true
+      

.github/ISSUE_TEMPLATE/submit-plugin_en.yml

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+name: Submit a new plugin
+title: "[Plugin]: Request to register a new plugin"
+labels: ["Independent Plugin"]
+description: "This template is only for submitting new plugins"
+body:
+  - type: input
+    attributes:
+      label: Plugin name
+      description: Fill in the name of the plugin
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Plugin code repository address
+      description: Only support Github
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Plugin description
+      description: The description of the plugin
+    validations:
+      required: true
+