Add bug issue templates

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,36 @@
+---
+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.
+
+**Bug target**
+Set a `x` between the square brackets if your bug occurred while using the CLI or the library
+
+- [ ] CLI (command line client)
+- [ ] Library
+
+**To Reproduce**
+Steps to reproduce the behavior:
+```
+$ crunchy ...
+```
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Client (please complete the following information):**
+ - OS: [e.g. Windows]
+ - Version [e.g. v2.2.2]
+
+**Additional context**
+Add any other context about the problem here.