add GitHub issue template

Author: RyanTM (Pololu)

.github/ISSUE_TEMPLATE/bug-report-or-feature-request.md

@@ -0,0 +1,11 @@
+---
+name: Bug report or feature request
+about: Did you find a specific bug in the code for this project? Do you want to request
+  a new feature? Please open an issue!
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Pololu Forum
+    url: https://forum.pololu.com/
+    about: Do you need help getting started? Can't get this code to work at all? Having problems with electronics? Please post on our forum!