Create standard.md

Author: adriaanm

.github/ISSUE_TEMPLATE/standard.md

@@ -0,0 +1,11 @@
+---
+name: General issue
+about: An empty template for general issues
+---
+Mostly for internal planning of Scala development, also for tracking less concrete ideas for improvements, long running tasks, 
+maintenance of the code base.
+
+NOTE: this tracker is *not* intended for bug reports, anything that would block a release, 
+or concrete, directly actionable, feature requests -- use https://github.com/scala/bug/issues for those.
+
+If unsure, please ask on https://contributors.scala-lang.org