Add issue template: content request

Author: Gingiris

.github/ISSUE_TEMPLATE/content-request.md

@@ -0,0 +1,13 @@
+---
+name: Content Request
+about: Suggest new content or improvements
+title: '[Request] '
+labels: enhancement
+assignees: ''
+---
+
+## What content would you like to see?
+<!-- Describe the topic or improvement -->
+
+## Why is this valuable?
+<!-- How would this help the community? -->