added github 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: ""
+---
+
+**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.
+
+**Environment (please complete the following information):**
+
+- OS: [e.g. Windows, macOS, Linux]
+- Rover Version [e.g. ]
+
+**Additional context**
+Add any other context about the problem here.

.github/PULL_REQUEST_TEMPLATE.md

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+# [Issue-id](https://github.com/Azure/caf-terraform-landingzones-starter/issues/ISSUE-ID-GOES-HERE)
+
+## PR Checklist
+
+---
+
+<!-- Use the check list below to ensure your branch is ready for PR. -->
+
+- [ ] I have updated the documentation accordingly.
+- [ ] I have added tests to cover my changes.
+- [ ] All new and existing tests passed.
+- [ ] My code follows the code style of this project.
+- [ ] I ran lint checks locally prior to submission.
+- [ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
+
+## Description
+
+<!-- Concise description of the problem and the solution or the feature being added -->
+
+## Does this introduce a breaking change
+
+- [ ] YES
+- [ ] NO
+
+<!-- If this introduces a breaking change, please describe the impact and migration path for existing applications below. -->
+
+## Testing
+
+<!-- Instructions for testing and validation of your code -->