github: update issue templates (#5537)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,51 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+First of all, read https://www.chiark.greenend.org.uk/~sgtatham/bugs.html.
+
+If you don't want to read, it's up to you. But don't waste your time continue reporting.
+
+The issue will be closed without any explanation if it does not satisfy any of following requirements:
+
+1. Please speak English, we have forum in [中文](https://discuss.gogs.io/c/getting-help/getting-help-chinese).
+2. Please post questions or config/deploy problems on our forum: https://discuss.gogs.io, here are bugs and feature requests only.
+3. Please do not end your title with a question mark or period.
+3. Please take a moment to search that an issue doesn't already exist.
+4. Please give all relevant information below for bug reports; incomplete details considered invalid report.
+
+**You MUST delete above content including this line before posting; too lazy to take this action considered invalid report.**
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional context**
+
+- Gogs version (or commit ref): 
+- Git version: 
+- Operating system: 
+- Database (use `[x]`):
+  - [ ] PostgreSQL
+  - [ ] MySQL
+  - [ ] MSSQL
+  - [ ] SQLite
+- Can you reproduce the bug at https://try.gogs.io:
+  - [ ] Yes (provide example URL)
+  - [ ] No
+  - [ ] Not relevant
+- Log gist (usually found in `log/gogs.log`):

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+The issue will be closed without any explanation if it does not satisfy any of following requirements:
+
+1. Please speak English, we have forum in [中文](https://discuss.gogs.io/c/getting-help/getting-help-chinese).
+2. Please post questions or config/deploy problems on our forum: https://discuss.gogs.io, here are bugs and feature requests only.
+3. Please do not end your title with a question mark or period.
+4. Please take a moment to search that an issue doesn't already exist.
+
+**You MUST delete above content including this line before posting; too lazy to take this action considered invalid report.**
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.