doc: add contributing and issue template

.github/CONTRIBUTING.md

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+## Tiny RDM Contribute Guide
+
+### Multi-language Contributions {#language}
+
+#### Adding New Language
+
+1. New file: Add a new JSON file in the [frontend/src/langs](../frontend/src/langs/), with the file naming format is "
+   {language}-{region}.json", e.g. English is "en-us.json", simplified Chinese is "zh-cn.json". Highly recommended to duplicate the [en-us.json](../frontend/src/langs/en-us.json) file and rename it.
+2. Fill content: Refer to [en-us.json](../frontend/src/langs/en-us.json), or duplicate the file and modify the language content.
+3. Update codes: Edit[frontend/src/langs/index.js](.../frontend/src/langs/index.js), import the new language data inside.
+    ```javascript
+    import en from './en-us'
+    // import your new localize file 'zh-cn' here
+    import zh from './zh-cn'
+    
+    export const lang = {
+        en,
+        // export new language data 'zh' here
+        zh,
+    }
+   ```
+4. Submit review once there are no issues with the translation context in the application. (learn how to submit)
+
+### Code Submission`(To be completed)` {#pull_request}
+
+#### Pull Request Title
+The format of PR's title like "<type>: <description>"
+- type: PR type
+- description: PR description
+
+PR type list below:
+
+| type     | description                                        |
+|----------|----------------------------------------------------|
+| revert   | Revert a commit                                    |
+| feat     | New features                                       |
+| perf     | Performance improvements                           |
+| fix      | Fix any bugs                                       |
+| style    | Style updates                                      |
+| docs     | Document updates                                   |
+| refactor | Code refactors                                     |
+| chore    | Some chores                                        |
+| ci       | Automation process configuration or script updates |

.github/CONTRIBUTING_zh.md

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+## Tiny RDM 代码贡献指南
+
+### 多国语言贡献 {#language}
+
+#### 增加新的语言
+1. 创建文件：在[frontend/src/langs](../frontend/src/langs/)目录下新增语言配置JSON文件，文件名格式为“{语言}-{地区}.json”，如英文为“en-us.json”，简体中文为“zh-cn.json”，建议直接复制[en-us.json](../frontend/src/langs/en-us.json)文件进行改名。
+2. 填充内容：参考[en-us.json](../frontend/src/langs/en-us.json)，或者直接克隆一份文件，对语言部分内容进行修改。
+3. 代码修改：在[frontend/src/langs/index.js](.../frontend/src/langs/index.js)文件内导入新增的语言数据
+    ```javascript
+    import en from './en-us'
+    // import your new localize file 'zh-cn' here
+    import zh from './zh-cn'
+    
+    export const lang = {
+        en,
+        // export new language data 'zh' here
+        zh,
+    }
+    ```
+4. 检查应用中对应翻译语境无问题后，可提交审核（[查看如何提交](#pull_request)）
+
+### 代码提交`(待完善)` {#pull_request}
+
+#### PR提交规范
+PR提交格式为“<type>: <description>”
+- type: 提交类型
+- description: 提交内容描述
+
+其中提交类型如下：
+
+| 提交类型     | 类型描述         |
+|----------|--------------|
+| revert   | 回退某个commit提交 |
+| feat     | 新功能/新特性      |
+| perf     | 功能、体验等方面的优化  |
+| fix      | 修复问题         |
+| style    | 样式相关修改       |
+| docs     | 文档更新         |
+| refactor | 代码重构         |
+| chore    | 杂项修改         |
+| ci       | 自动化流程配置或脚本修改 |
+

.github/ISSUE_TEMPLATE/but_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: '[BUG]'
+labels: ''
+assignees: ''
+---
+
+**Tiny RDM Version**
+What version of Tiny RDM are you using?
+
+**OS Version**
+Which OS and version you launch? (Mac/Windows/Linux)
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+Steps to Reproduce:
+
+1.
+2.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: '[FEATURE]'
+---