meta: update issue templates

Adds a template for kernel/runtime bug reports.

.github/ISSUE_TEMPLATE/kernel-or-runtime-bug-report.md

@@ -0,0 +1,39 @@
+---
+name: Kernel or runtime bug report
+about: Use this template to file a bug for low-level system components, e.g. Hoon,
+  Arvo, Zuse, the vanes, Vere, etc.
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+<!-- A good bug report, description of a crash, etc., should ideally be *reproducible*, with clear steps as to how another developer can replicate and examine your problem.  That said, this isn't always possible; some bugs depend on having created a complicated or unusual state, or can otherwise simply be difficult to trigger again (say, you encountered it in the last continuity era).
+
+Your issue should thus at a minimum be *informative*.  The best advice here is probably "don't write bad issues," where "bad" is a matter of judgment and taste.  Issues that the maintainers don't judge to be sufficiently useful or informative may be closed. -->
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behaviour:
+1. ...
+2. ...
+3. ...
+
+**Expected behaviour**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**System (please supply the following information, if relevant):**
+ - OS: [e.g. macOS, linux64, FreeBSD]
+ - Vere and Urbit OS versions
+ - Your ship's `%base` hash (use `.^(@uv %cz /=base=)` to check)
+
+**Additional context**
+Add any other context about the problem here.
+
+**Notify maintainers**
+If you happen to know who the appropriate maintainers are, consider mentioning them with an @ here.  You may want to use `git blame` to see who has last touched any relevant code.