add ISSUE template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,29 @@
+# First and foremost consider this:
+- Only RetroArch bugs should be filed here. Not core bugs or game bugs
+- This is not a forum or a help section, this is strictly developer oriented
+
+## Description
+
+[Description of the bug]
+
+### Expected behavior
+
+[What you expected to happen]
+
+### Actual behavior
+
+[What is actually happening]
+
+### Steps to reproduce the bug
+
+1. [First step]
+2. [Second step]
+3. [and so on...]
+
+### Bisect Results
+
+[Try to bisect and tell us when this started happening]
+
+### System information
+
+- OS: [The operating system you're running]