Add initial issue templates

.github/ISSUE_TEMPLATE/Bug_Report.yml

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+name: "🐛 Bug report"
+description: Report errors or unexpected behavior
+labels: [Issue-Bug]
+body:
+- type: markdown
+  attributes:
+    value: |
+      Please make sure to [search for existing issues](https://github.com/microsoft/devhome/issues) before filing a new one!
+
+- id: version
+  type: input
+  attributes:
+    label: Dev Home version
+    placeholder: "0.1.3651.0"
+    description: 
+  validations:
+    required: false
+
+- id: windowsversion
+  type: input
+  attributes:
+    label: Windows build number
+    placeholder: "10.0.23400.0"
+    description: |
+      Please run `ver` or `[Environment]::OSVersion`.
+  validations:
+    required: false
+
+- id: othersoftware
+  type: textarea
+  attributes:
+    label: Other software
+    description: If you're reporting a bug about our interaction with other software, what software? What versions?
+    placeholder: 
+  validations:
+    required: false
+
+- id: repro
+  type: textarea
+  attributes:
+    label: Steps to reproduce
+    placeholder: Tell us the steps required to trigger your bug.
+  validations:
+    required: true
+
+- id: expectedbehavior
+  type: textarea
+  attributes:
+    label: Expected behavior
+    description: If you want to include screenshots, paste them into the markdown editor below.
+    placeholder: What were you expecting?
+  validations:
+    required: false
+
+- id: actualbehavior
+  type: textarea
+  attributes:
+    label: Actual behavior
+    placeholder: What happened instead?
+  validations:
+    required: true

.github/ISSUE_TEMPLATE/Documentation_Issue.yml

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+name: "📄 Documentation issue"
+description: Report issues on our documentation
+labels: 
+- Issue-Docs 
+body:
+- type: textarea
+  attributes: 
+    label: Provide a description of requested docs changes
+    placeholder: Briefly describe which document needs to be corrected and why.
+  validations:
+    required: true

.github/ISSUE_TEMPLATE/Feature_Request.yml

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+name: "🚀 Feature request or idea"
+description: Suggest a new feature or improvement (this does not mean you have to implement
+  it)
+labels:
+- Issue-Feature
+body:
+- id: description
+  type: textarea
+  attributes: 
+    label: Description of the new feature / enhancement
+    placeholder: What is the expected behavior of the proposed feature?
+  validations:
+    required: true
+
+- id: scenario
+  type: textarea
+  attributes:
+    label: Scenario when this would be used?
+    placeholder: What is the scenario this would be used? Why is this important to your workflow as a power user?
+  validations:
+    required: true
+
+- id: supportinginfo
+  type: textarea
+  attributes:
+    label: Supporting information
+    placeholder: "Having additional evidence, data, tweets, blog posts, research, ... anything is extremely helpful. This information provides context to the scenario that may otherwise be lost."
+  validations:
+    required: false
+
+- type: markdown
+  attributes:
+    value: Please limit one request per issue.

.github/ISSUE_TEMPLATE/Translation_Issue.yml

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+name: "🌐 Localization/Translation issue"
+description: Report incorrect translations.
+labels:
+- Issue-Translation
+
+body:
+- type: markdown
+  attributes:
+    value: Please make sure to [search for existing issues](https://github.com/microsoft/devhome/issues) before filing a new one!
+
+- id: version
+  type: input
+  attributes:
+    label: Dev Home version
+    placeholder: "0.1.3651.0"
+    description: 
+  validations:
+    required: false
+
+- id: languageaffected
+  type: input
+  attributes:
+    label: 🌐 Language affected
+    placeholder: "German"
+  validations:
+    required: true
+
+- type: textarea
+  attributes: 
+    label: ❌ Actual phrase(s)
+    placeholder: What is there? Please include a screenshot - it's very helpful to us! 
+  validations:
+    required: true
+
+- type: textarea
+  attributes: 
+    label: ✔️ Expected phrase(s)
+    placeholder: What was expected?
+  validations:
+    required: false
+
+- type: textarea
+  attributes:
+    label: Why is the current translation wrong
+    placeholder: Why do you feel this is incorrect?
+  validations:
+    required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+
+contact_links:
+  - name: 🔐 Microsoft Security Response Center
+    url: https://msrc.microsoft.com/create-report
+    about: Please report security vulnerabilities here.
+

.github/pull_request_template.md

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+## Summary of the pull request
+
+## References and relevant issues
+
+## Detailed description of the pull request / Additional comments
+
+## Validation steps performed
+
+## PR checklist
+- [ ] Closes #xxx
+- [ ] Tests added/passed
+- [ ] Documentation updated