Add feature request issue template for p4python

Author: shashankdt-perforce

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,22 @@
+---
+name: Feature Request
+about: Suggest a feature or improvement
+title: "[Feature]: "
+labels: enhancement
+---
+
+## Summary
+
+Describe the feature or improvement you would like to see.
+
+## Motivation
+
+Why is this feature needed? What problem does it solve?
+
+## Proposed Approach (Optional)
+
+If you have ideas for how it could work, describe them here.
+
+## Additional Context
+
+Add any examples, references, or related information.