enh: add bug report template

Add a bug report template

Author: sanjayankur31

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,31 @@
+---
+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. ...
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Platform information (please complete the following information):**
+ - OS: [e.g. Linux/Ubuntu/Fedora/MacOS]:
+ - Compiler information (e.g. `gcc` version):
+ - libxsd version:
+ - cmake version:
+ - NeuroML_API Version (release/git commit):
+
+**Minimum example of issue**
+A code snippet that we can use to reproduce the bug, if possible.
+
+**Additional context**
+Add any other context about the problem here.