Update issue templates

Author: tjhunter

.github/ISSUE_TEMPLATE/initiative.md

@@ -0,0 +1,21 @@
+---
+name: Initiative
+about: Large feature that will span multiple sprints
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## What are you trying to do
+
+## Design doc
+
+highly encouraged: (link to design doc, if any)
+
+If no design doc:
+
+- what are the goal?
+- what are the non-goals?
+- what are the prerequisite and the constraints?
+- what is success ?