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: "[Bug]"
+labels: Bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Set up (please complete the following information)**
+  - Your Board and BSP version
+  - Your OS (mac/windows/linux) and its version
+  - Serial debug log (enable IDE's Debug Mode Level to 1 or 2)  
+
+**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**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[Feature]"
+labels: Feature
+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/for-questions-please-use-our-forum-support.md

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+---
+name: For questions please use our forum support
+about: Please don't open issue for question
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Please DO NOT use GitHub issues for question or troubleshooting projects.**  Instead use the forums at http://forums.adafruit.com. Only create issue if it is a bug, feature  or discussion that requires **code changes to resolve**.
+
+**Check our tutorial and examples** There is chance that our tutorial and examples has useful information for you:
+- [Feather nRF52832 tutorial](https://learn.adafruit.com/bluefruit-nrf52-feather-learning-guide) 
+- [Feather nRF52840 tutorial](https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather)