Create feature_request.md (#1218)

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,11 @@
+---
+name: Feature request
+about: Suggest a feature or improvement
+title: ''
+labels: feature
+assignees: ''
+
+---
+
+**Describe the feature**
+A clear description of what the feature is.