docs: add a github issue template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,8 @@
+Please provide the following details if possible or relevant:
+
+- [] the version of Ace impacted by the issue (as returned by the `ace -v` command).
+- [] the version of Node used to run Ace (as returned by the `node -v` command).
+- [] your operating system and version.
+- [] if the issue is a bug when running Ace: the error message as produced in the log file (you can enable debug logging with the `--verbose` option).
+- [] if the issue is about the HTML report: the browser(s) and version(s) you used.
+- [] if possible, let us know if you can share a sample input file to help us reproduce the issue.