Create github issue template

.github/ISSUE_TEMPLATE.md

+**Do you want to request a feature or report a bug?**
+
+
+**What is the current behavior?**
+
+
+**If the current behavior is a bug, please provide the steps to reproduce, along with the following information:**
+- OS:
+- Browser:
+- Page settings (from the "Page Settings" section of the generator)
+  - Page Size:
+  - Card Size:
+  - Cards/page:
+  - Arrangement:
+
+
+**What is the expected behavior?**
+