Add issue template

.github/ISSUE_TEMPLATE/default.md

@@ -0,0 +1,13 @@
+---
+name: Default
+about: Don't create issues here. Use the mailing list instead.
+title: Don't create issues here. Use the mailing list instead.
+labels: ''
+assignees: ''
+
+---
+
+**Don't create issues here**
+This is just a git clone of [Bellard's releases](https://bellard.org/quickjs).
+
+Issue and features must be sent to the [official mailing list](https://www.freelists.org/list/quickjs-devel).