ci: add feature request template

Author: rawqubit

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,17 @@
+name: Feature Request
+description: Suggest a new feature or improvement
+title: "[feat]: "
+labels: ["enhancement"]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: What problem does this solve?
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed solution
+    validations:
+      required: true