github: Add bug report issue template

Author: stephane-caron

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,41 @@
+---
+name: 🐞 Bug report
+about: Something is not working the way it should
+title: ''
+labels: ''
+assignees: ''
+---
+
+## Bug description
+
+What is expected? What happens instead?
+
+## Reproduction steps
+
+Steps to reproduce the bug:
+
+1. Load to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+### Code
+
+If this is a runtime issue, please share some minimal code to reproduce it:
+
+```py
+...
+```
+
+### Screenshots
+
+If applicable, add screenshots to help explain your problem.
+
+### System
+
+- OS: [e.g. Ubuntu 20.04]
+- robot\_descriptions version: [e.g. 3.2.0]
+
+## Additional context
+
+Add any other context about the problem.