[github] Feature request issue template (#245)

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -0,0 +1,22 @@
+name: Feature request
+description: Let us know about something you'd like to see as part of the Oxide Terraform provider
+labels: ["feature"]
+body:
+  - type: textarea
+    id: overview
+    attributes:
+      label: Overview
+      description: What is it that you would like to be able to do with this feature?
+    validations:
+      required: true
+
+  - type: textarea
+    id: implementation
+    attributes:
+      label: Implementation details
+      description: Optionally provide an idea of how you'd like this feature to be implemented.
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Anything else you would like to add?