Create feature-request-template.md

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

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+---
+name: Feature Request Template
+about: "For feature requests. Please search for existing issues first. Also see CONTRIBUTING."
+
+---
+
+**Please Describe The Problem To Be Solved**
+(Replace This Text: Please present a concise description of the problem to be addressed by this feature request. Please be clear what parts of the problem are considered to be in-scope and out-of-scope.)
+
+**(Optional): Suggest A Solution**
+(Replace This Text: A concise description of your preferred solution. Things to address include:
+* Details of the technical implementation
+* Tradeoffs made in design decisions
+* Caveats and considerations for the future
+
+If there are multiple solutions, please present each one separately. Save comparisons for the very end.)