Add compatibility report issue template

.github/ISSUE_TEMPLATE/compatibility-report.md

@@ -0,0 +1,21 @@
+---
+name: Compatibility Report
+about: Report the compatibility status of an app
+title: "[compat] <App name>"
+labels: ''
+assignees: ''
+
+---
+
+**App name:**
+
+**App URL:**
+
+**App ID (if possible):**
+
+
+**Issues:**
+Set the appropriate `status-` label and list any issues here.
+
+
+**Error log (if applicable):**