Add Issue Templates (pointfreeco#556)

Author: stephencelis

CODE_OF_CONDUCT.md renamed to .github/CODE_OF_CONDUCT.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+Give a clear and concise description of what the bug is.
+
+**To Reproduce**
+Zip up a project that reproduces the behavior and attach it by dragging it here.
+
+```swift
+// And/or enter code that reproduces the behavior here.
+
+```
+
+**Expected behavior**
+Give a clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment**
+  - swift-snapshot-testing version [e.g. 1.9.0]
+  - Xcode [e.g. 13.2]
+  - Swift [e.g. 5.5]
+  - OS: [e.g. iOS 15]
+
+**Additional context**
+Add any more context about the problem here.

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Question
+about: Have a question about SnapshotTesting?
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+SnapshotTesting uses GitHub issues for bugs. For more general discussion and help, please use [GitHub Discussions](https://github.com/pointfreeco/swift-snapshot-testing/discussions).