Add feature request issue template

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,35 @@
+---
+name: 💡 Feature request
+about: Suggest an idea for this project
+title: "[RFE]"
+labels: feature, triage
+assignees: ''
+
+---
+
+## Description
+
+**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 [...]_
+
+**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._
+
+**If the feature request is approved, would you be willing to submit a PR?**
+
+Yes / No _(Help can be provided if you need assistance submitting a PR)_
+
+## Environment Details
+
+- **Operating System:**
+- **`ec` CLI Version, run `ec version --short`:**
+- **Shell:**
+- **Additional context:**
+
+_Any other context about this feature here._