Add a template for a feature request

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,13 @@
+---
+name: Feature request
+about: Suggest a new feature or improvement
+title: ''
+labels: C-enchancement
+assignees: ''
+---
+
+<!-- Your feature may already be reported!
+Please search on the issue tracker before creating one. -->
+
+#### Describe your feature request
+