feat: add bug report template (#415)

Author: bitcoin-tools

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,28 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+
+
+**Steps to Reproduce**
+
+
+**Expected behavior**
+
+
+**Screenshots (optional)**
+
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. Debian]
+ - Environment [e.g. bare metal, docker]
+ - Release [e.g. 1.0.0]
+
+**Additional context**
+Add any other context about the problem here.