Add issue template for maintainer

.github/ISSUE_TEMPLATE/01-maintainer.md

@@ -0,0 +1,19 @@
+---
+name: Create issue
+about: |-
+  As a maintainer, create an actionable issue here.
+---
+
+**PLEASE USE GITHUB DISCUSSIONS FOR BUG REPORTS AND FEATURE REQUESTS.**
+
+See <https://github.com/swsnr/turnon/discussions>.
+
+As a maintainer, I reserve Github issues for fully specified actionable issues
+which are ready to be worked on, and which I intend to address sooner or later.
+
+Please do not create issues for bug reports and feature requests; refer to
+Github discussions for these. If a bug is confirmed and reproduced, or a
+feature request fully specified, and if I then intend to actually work on it,
+I'll open a corresponding issue.
+
+I'll close any other issues without warning or explanation.