Create dash-feature.md

Author: quinn-dougherty

.github/ISSUE_TEMPLATE/dash-feature.md

@@ -0,0 +1,14 @@
+---
+name: Dash feature request
+about: Report something that's missing from the Dash version
+title: [dash]
+labels: 'dash'
+assignees: ''
+
+---
+
+### Description:
+
+
+
+[ ] This is something we can copy over from streamlit (screenshots if applicable)