chore: add issue template

Author: nhedger

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,26 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: triage
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Version of `@hedger/nestjs-encryption`**
+x.y.z
+
+**Version of `@nestjs/common`**
+x.y.z
+
+**Minimal reproduction repository**
+https://
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Additional context**
+Add any other context about the problem here.