update pr & issue template for more neatly arranged workspace

.github/ISSUE_TEMPLATE/a_issue_report.md

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+---
+name: Issues
+about: Create an issue if you need any help
+title: '[Issue] '
+labels: 'help wanted, question'
+assignees: ''
+
+---
+**Did you look for other closed issues that have the same problem?**
+<!--- It will be easier for us to solve your problem if there is less duplication of problems -->
+
+**Describe the issue**
+<!--- A clear and concise description of what the issue is. -->
+
+**Which branch did you use?**
+<!--- Stable branch / Development branch -->
+
+**Screenshots**
+<!--- If applicable, add screenshots to help explain your problem. -->
+
+**Additional context**
+<!--- Add any other context about the problem here. -->
+

.github/ISSUE_TEMPLATE/b_bug_report.md

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+---
+name: Bug report
+about: Create a bug report to help us improve Grasscutter
+title: '[Bug] '
+labels: 'bug'
+assignees: ''
+
+---
+<!--- ONLY USE this form for bug reporting. If you need help or support, please USE issue report form instead. -->
+
+**Describe the bug**
+<!--- A clear and concise description of what the bug is. -->
+
+**Which branch did you use?**
+<!--- Stable branch / Development branch -->
+
+**Screenshots**
+<!--- If applicable, add screenshots to help explain your problem. -->
+
+**Additional context**
+<!--- Add any other context about the problem here. -->

.github/ISSUE_TEMPLATE/c_feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for Grasscutter
+title: '[Feature Request] '
+labels: 'enhancement, suggestion'
+assignees: ''
+
+---
+
+**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. -->

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Grasscutter Discord
+    url: https://discord.gg/T5vZU6UyeG
+    about: For support, discuss and and other things with Grasscutter.
+

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+Please carefully read the [Contributing note](https://github.com/Grasscutters/Grasscutter/blob/stable/CONTRIBUTING.md) and [Code of conduct](https://github.com/Grasscutters/Grasscutter/blob/development/CODE_OF_CONDUCT.md) before making any pull requests.
+And, **Do not make a pull request to merge into stable unless it is a hotfix. Use the development branch instead.**
+## Issues fixed by this PR
+
+<!--- Put the links of issues that may be fixed by this PR here (if any). -->
+## Type of changes
+
+<!--- Put an `x` in all the boxes that apply your changes. -->
+
+- [ ] Bug fix
+- [ ] New feature 
+- [ ] Enhancement
+- [ ] Documentation
+
+## Checklist:
+
+- [ ] My code follows the style guidelines of this project
+- [ ] My pull request is unique and no other pull requests have been opened for these changes
+- [ ] I have read the [Contributing note](https://github.com/Grasscutters/Grasscutter/blob/stable/CONTRIBUTING.md) and [Code of conduct](https://github.com/Grasscutters/Grasscutter/blob/development/CODE_OF_CONDUCT.md)
+- [ ] I am responsible for any copyright issues with my code if it occurs in the future.