add GitHub issue templates

.github/ISSUE_TEMPLATE/3-feature_request.md

@@ -0,0 +1,27 @@
+---
+name: Feature request
+about: Suggest an idea for privacy.sexy
+labels: enhancement
+---
+
+<!--
+Thank you for suggesting an idea to make privacy better. 🤗
+
+Please fill in as much of the template below as you're able.
+-->
+
+### Problem Description
+
+<!-- Please add a clear and concise description of the problem you are seeking to solve with this feature request. Ex. I'm always frustrated when [...] -->
+
+### Proposed solution
+
+<!-- Describe the solution you'd like in a clear and concise manner. -->
+
+### Alternatives considered
+
+<!-- A clear and concise description of any alternative solutions or features you've considered. -->
+
+### Additional information
+
+<!-- Add any other context or screenshots about the feature request here. -->