add issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Description**
+A clear and concise description of what the bug is.
+
+**Expected behavior**
+What you expected to happen.
+
+**Current behavior**
+What happened.
+
+**To Reproduce**
+Steps to reproduce the behaviour.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Logs**
+Post logs here or paste them to [Ghostbin](https://ghostbin.co) and insert the link here.
+
+**Environment**
+
+- Platform: `Android`/`Flutter`/`iOS`/`macOS`/`ReactNative`/`tvOS`
+- Application Type: `cocoapods`/`local dependency`/`maven central`/`npm`/`pub`
+- Architecture: `arm-v7a`, `arm-v7a-neon`, `arm64-v8a`, `x86`, `x86_64`, `armv7`, `armv7s`, `arm64`, `arm64-mac-catalyst`, `arm64-simulator`, `arm64e`, `i386`, `x86-64`, `x86-64-mac-catalyst`
+- Version: `v4.5`/`v4.5.LTS`
+- Source branch: `main`, `development`
+- Xcode version: `12.4.1`
+- Cocoapods version: `1.10.1`
+- Android Studio version: `4.0`
+- Android NDK version: `r22b`
+- flutter doctor: ` `
+- react-native info: ` `
+
+**Other**
+Add any other context about the problem here.

.github/pull_request_template.md

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+## Description
+Describe the change and/or the issue fixed in this pull request. 
+Please also include the context and motivation about the changes introduced.
+
+## Type of Change
+- New feature
+- Bug fix
+- Documentation
+
+## Platform
+Which platform this PR intends to improve/fix?
+
+## Checks
+- [ ] Breaks existing functionality
+- [ ] Implementation is completed, not half-done 
+- [ ] Is there another PR already created for this feature/bug fix
+
+## Tests
+How are these changes verified? Please provide test instructions.
+Also list any relevant details about your test configuration.

.github/workflows/stale.yml

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+name: mark stale issues and pull requests
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v4
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+          stale-pr-message: 'This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+          stale-issue-label: 'no-issue-activity'
+          stale-pr-label: 'no-pr-activity'
+          exempt-issue-labels: 'enhancement'
+          exempt-pr-labels: 'enhancement'
+          exempt-all-assignees: 'true'
+
+permissions:
+  issues: write
+  pull-requests: write