Merge pull request #11893 from eed3si9n/wip/template

Issue template, take 2

Author: dwijnand

.github/ISSUE_TEMPLATE/bug.md

@@ -0,0 +1,21 @@
+---
+name: "\U0001F41B Bug report"
+about: Report a bug in the Scala compiler or standard library
+title: ''
+assignees: ''
+
+---
+
+## reproduction steps
+
+```scala
+println("hello, world")
+```
+
+## problem
+
+```scala
+// TODO add compilation output here
+```
+
+## expectation

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,10 @@
+---
+name: "\U0001F389 Feature request"
+about: Please use https://contributors.scala-lang.org/ for enhancement ideas
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+For enhancement ideas, please use https://contributors.scala-lang.org/, not scala/bug.