Create feature_request.md

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Which addon?**
+<!--The title of the addon the new feature is for.-->
+
+**Is your feature request related to a problem? Please describe.**
+<!--A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]-->
+
+**If a new addon, have you checked on Google that such as addon doesn't already exists? 
+
+**Describe the solution you'd like**
+<!--A clear and concise description of what you want to happen.-->
+
+**Describe alternatives you've considered**
+<!--A clear and concise description of any alternative solutions or features you've considered.-->
+
+**Additional context**
+<!--Add any other context or screenshots about the feature request here.-->