Add issue templates for the new issue template chooser

.github/ISSUE_TEMPLATE/feature---enhancement-request.md

@@ -0,0 +1,35 @@
+---
+name: Feature / Enhancement request
+about: Describe what you think is missing or could be improved in OpenRA.
+title: ''
+labels: Idea/Wishlist
+assignees: ''
+
+---
+
+<!-- This is a guideline that shall help you to describe your idea for a missing feature or enhancement. Please follow the instructions and replace any placeholders that are written in capital letters. Instructions like this comment will not be visible in your report. -->
+
+<!-- Important: Help us to avoid duplicates and use the search function to find existing requests. Please do not submit duplicate requests! Try to help others to find your request by using a precise title. -->
+
+## Motivation
+<!-- Please provide a clear and concise description of the motivation behind the request. If your request is related to a problem or limitation, describe it below. -->
+
+REQUEST MOTIVATION
+
+
+## Proposed solution
+<!-- Please describe your idea and how it is intended to address the motivation of your request. Provide a clear and concise description of the proposed changes. -->
+
+PROPOSED SOLUTION
+
+
+## Side effects
+<!-- Changes often have side effects or unintended consequences. If you expect that your solution has any side effects, please describe them below. -->
+
+EXPECTED SIDE EFFECTS
+
+
+## Alternatives
+<!-- Please outline any alternative solutions you have considered. -->
+
+ALTERNATIVES