Add feature request issue template

Author: nayefserag

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,19 @@
+---
+name: Feature request
+about: Suggest a new feature or improvement
+title: "[Feature] "
+labels: enhancement
+assignees: ""
+---
+
+## Problem
+What problem does this solve? Who is affected?
+
+## Proposed solution
+Describe the feature you would like.
+
+## Alternatives considered
+Any alternative approaches you have thought about.
+
+## Additional context
+Mockups, links, references, etc.