Update issue templates

In preparation for open preview, let's start with some basic templates.

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+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.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/documentation.md

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+---
+name: Documentation
+about: Report an issue with documentation or suggest improvements
+title: "[DOCS]"
+labels: documentation
+assignees: ''
+
+---
+
+## Type of documentation issue
+
+<!-- What kind of documentation issue is this? Please select one -->
+
+- [ ] Missing documentation
+- [ ] Incorrect/outdated documentation
+- [ ] Unclear documentation
+- [ ] Typo or grammar issue
+- [ ] Example code doesn't work
+- [ ] Other
+
+## Location
+
+<!-- Where is the documentation issue located? -->
+<!-- e.g., README.md line 42, docs/getting-started.md, API reference for function X -->
+
+**Location:** 
+
+## Describe the issue
+
+<!-- What's wrong with the current documentation? -->
+
+
+
+## Suggested improvement
+
+<!-- How should the documentation be improved? -->
+
+
+
+## Additional context
+
+<!-- Add any other context about the documentation issue here -->
+
+
+
+## Contribution
+
+- [ ] I'd be willing to submit a PR to fix this documentation issue

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+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.