chore: add GitHub issue and PR templates with automation workflows

- Add bilingual issue templates (English & Chinese)
  - Bug report template with prerequisite checkboxes
  - Feature request template
  - Question template
  - Reverse checkbox detection ("I have not read carefully")

- Add bilingual PR templates (English & Chinese)
  - Comprehensive checklist for code quality and testing
  - Test environment documentation section
  - Breaking changes section

- Add GitHub Actions workflows
  - Auto-labeling based on issue content
  - Auto-close issues with unchecked prerequisites
  - Stale issue and PR management (90/60 days)

- Add template configuration
  - External links for discussions and wiki
  - Template chooser interface

1 files changed, 119 insertions, 0 deletions

diff --git a/.github/PULL_REQUEST_TEMPLATE/en-pull_request_template.md b/.github/PULL_REQUEST_TEMPLATE/en-pull_request_template.md
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+# Description
+
+<!-- Provide a brief description of the changes in this PR -->
+
+## Type of Change
+
+<!-- Mark the relevant option with an "x" -->
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] UI/UX improvement
+- [ ] Performance improvement
+- [ ] Code refactoring (no functional changes)
+- [ ] Configuration change
+- [ ] Test addition or update
+
+## Related Issues
+
+<!-- Link to related issues using #issue_number -->
+
+Closes #
+Related to #
+
+## Changes Made
+
+<!-- Describe the changes in detail -->
+
+### Backend (Rust)
+
+-
+
+### Frontend (Svelte)
+
+-
+
+### Configuration
+
+-
+
+## Testing
+
+<!-- Describe the tests you ran and how to reproduce them -->
+
+### Test Environment
+
+- **OS**: <!-- e.g., Windows 11, macOS 14, Ubuntu 22.04 -->
+- **DropOut Version**: <!-- e.g., 0.1.23 -->
+- **Minecraft Version Tested**: <!-- e.g., 1.21.1 -->
+- **Mod Loader**: <!-- e.g., Fabric 0.16.0, Forge 49.0.3, or N/A -->
+
+### Test Cases
+
+- [ ] Tested on Windows
+- [ ] Tested on macOS
+- [ ] Tested on Linux
+- [ ] Tested with vanilla Minecraft
+- [ ] Tested with Fabric
+- [ ] Tested with Forge
+- [ ] Tested game launch
+- [ ] Tested authentication flow
+- [ ] Tested Java detection/download
+
+### Steps to Test
+
+1.
+2.
+3.
+
+## Checklist
+
+<!-- Mark completed items with an "x" -->
+
+### Code Quality
+
+- [ ] My code follows the project's style guidelines
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] My changes generate no new warnings or errors
+
+### Testing Verification
+
+- [ ] I have tested my changes locally
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] I have tested on at least one target platform
+
+### Documentation
+
+- [ ] I have updated the documentation accordingly
+- [ ] I have updated the README if needed
+- [ ] I have added/updated code comments where necessary
+
+### Dependencies
+
+- [ ] I have checked that no unnecessary dependencies were added
+- [ ] All new dependencies are properly documented
+- [ ] `Cargo.lock` and/or `pnpm-lock.yaml` are updated (if dependencies changed)
+
+## Screenshots / Videos
+
+<!-- If applicable, add screenshots or videos to demonstrate the changes -->
+
+## Additional Notes
+
+<!-- Add any other context about the PR here -->
+
+## Breaking Changes
+
+<!-- If this is a breaking change, describe the migration path for users -->
+
+---
+
+**For Maintainers:**
+
+- [ ] Code review completed
+- [ ] CI checks passing
+- [ ] Ready to merge