Introduce an issue template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,14 @@
+---
+name: Bug report
+about: Report an issue with Thunderbolt 3 Unblocker
+title: ''
+labels: unconfirmed
+assignees: rgov
+
+---
+
+<!--
+Please review the Troubleshooting document for tips and instructions on filing an actionable bug report. Issues without a `t3u-diagnose.txt` attachment may be rejected!
+
+https://github.com/rgov/Thunderbolt3Unblocker/wiki/Troubleshooting
+-->