Added issue templates

Author: jasonjoh

.github/ISSUE_TEMPLATE/ask-a-question.md

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+---
+name: Ask a question
+about: Ask a question about Graph, adding features to this sample, etc.
+title: ''
+labels: question, needs triage
+assignees: ''
+
+---
+
+Thank you for taking an interest in Microsoft Graph development! Please feel free to ask a question here, but keep in mind the following:
+
+- This is not an official Microsoft support channel, and our ability to respond to questions here is limited. Questions about Graph, or questions about adding a new feature to the sample, will be answered on a best-effort basis.
+- Questions should be asked on [Stack Overflow](https://stackoverflow.com/questions/tagged/microsoft-graph).
+- Issues with Microsoft Graph itself should be handled through [support](https://developer.microsoft.com/graph/support).

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug report, needs triage
+assignees: ''
+
+---
+
+**Where did you get the code?**
+- [ ] Downloaded from GitHub
+- [ ] Downloaded from the [Microsoft Graph quick start tool](https://developer.microsoft.com/graph/quick-start)
+- [ ] Followed the tutorial from [Microsoft Graph tutorials](https://docs.microsoft.com/graph/tutorials)
+
+**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.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Dependency versions**
+ - Authentication library (MSAL, etc.) version:
+ - Graph library (Graph SDK, REST library, etc.) version:  
+
+**Additional context**
+Add any other context about the problem here.