Add Pull Request template and Issue template

.github/ISSUE_TEMPLATE.md

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+- SwitchyOmega is an open source project for proxy server switching and run with noneprofit / SwitchyOmage 是一个非营利、开源的代理服务器切换软件. （该项目与翻墙无关，请勿混淆）
+
+- Please read Wiki carefully, especially / 提问前请先阅读wiki https://github.com/FelisCatus/SwitchyOmega/wiki .
+- Or search from Issue Board / 或在Issue Board中搜索 https://github.com/FelisCatus/SwitchyOmega/search?q=is%3Aissue&unscoped_q=is%3Aissue&type=Issues
+- Recommanded to answer the following questions before submission.  / 推荐按照以下格式描述你的问题
+
+### SwitchyOmega version / SwitchyOmega版本
+
+
+### Environment(Web browser & OS) / 使用环境（浏览器及操作系统）
+
+
+### Problem description / 问题描述

.github/PULL_REQUEST_TEMPLATE.md

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+## Please follow the guide below
+
+- You will be asked some questions, please read them **carefully** and answer honestly
+- Put an `x` into all the boxes [ ] relevant to your *pull request* (like that [x])
+- Use *Preview* tab to see how your *pull request* will actually look like
+
+- [ ] [Searched](https://github.com/FelisCatus/SwitchyOmega/search?q=is%3Apr&type=Issues) for similar pull requests
+- [ ] Compiled the code with Node.js
+
+### What is the purpose of your *pull request*?
+- [ ] Bug fix
+- [ ] Improvement
+- [ ] New feature
+
+---
+
+### Description of your *pull request* and other information
+
+Explanation of your *pull request* in arbitrary form goes here. Please make sure the description explains the purpose and effect of your *pull request* and is worded well enough to be understood. Provide as much context and examples as possible.