Update issue templates

.github/ISSUE_TEMPLATE/need-help.md

@@ -0,0 +1,23 @@
+---
+name: Need help
+about: Describe this issue template's purpose here.
+title: "[Need Help] "
+labels: help wanted
+assignees: ''
+
+---
+
+## Description
+
+Describe your problem as clearly as possible.
+
+## More info
+
+Additional information such as prototypes or screenshots can help developers understand what you mean.
+
+## Gist code
+
+```dart
+```
+
+## Plugin version