docs: prepare repository for open-source collaboration

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: Suggest an improvement
+title: "[Feature]: "
+labels: enhancement
+assignees: ''
+---
+
+## Problem Statement
+
+What problem are you trying to solve?
+
+## Proposed Solution
+
+Describe the desired behavior and UX.
+
+## Alternatives Considered
+
+What alternatives did you evaluate?
+
+## Additional Context
+
+Any references, mockups, or constraints.