github: Add feature request

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

.github/ISSUE_TEMPLATE/feature_request.md

+---
+name: Feature request
+about: If you have an idea for a new feature.
+
+---
+
+## Summary
+_A clear and concise description of what you want to happen and the use case._
+
+## Additional information
+_Add any other context or screenshots/mockups about the feature request here._
+
+> If you are using an old stable release please upgrade first and verify if your features is not there.