add: page request template for issue

.github/ISSUE_TEMPLATE/page_request.md

@@ -0,0 +1,14 @@
+---
+name: Page request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the page you'd like to add**
+A clear and concise description of what you want to add page.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.