refactor(doc): add back issue template to root

Author: Ghislain Beaulac

ISSUE_TEMPLATE.md

@@ -0,0 +1,43 @@
+---
+name: Issue report
+about: Create a report to help us improve the library
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!---
+Thanks for filing an issue! However, before you submit, please read the following:
+1. Search open/closed issues before submitting since someone might have asked the same thing before!
+2. Is it really an issue or is it a question? If it's a question, have you considered asking on Stack Overflow?
+-->
+
+## I'm submitting a Bug report
+
+### Your Environment
+<!--- Include as many relevant details as possible about the environment you experienced the bug in -->
+| Software          | Version(s) |
+| ----------------- | ---------- |
+| Angular           |
+| Angular-Slickgrid |
+| TypeScript        |
+| Operating System  |
+| NPM/Node/Yarn     |
+
+### Context
+<!--- How has this issue affected you? What are you trying to accomplish? -->
+<!--- Providing context helps us come up with a solution that is most useful in the real world -->
+
+### Expected Behavior
+<!--- Tell us what should happen -->
+
+### Current Behavior
+<!--- Tell us what happens instead of the expected behavior -->
+<!--- If you are seeing an error, please include the full error message and stack trace -->
+
+### Possible Solution
+<!--- Not obligatory, but suggest a fix/reason for the bug -->
+
+### Code Sample
+<!-- Please provide Stackblitz, Gist or Code Sample to reproduce the issue -->